feat: Phase 2 — ports package, secrets port move, postgres adapter move

Problem: the hexagon's Phase 2 (plans/2026-08-15-hexagonal-architecture.md)
must give the use-cases-to-be their contract surface: driven-port
interfaces, test fakes, the secrets interface moved into core, and the
postgres package inside the adapters tree — before the first vertical
slice (Phase 3) can wire a composition root.

Change:
- internal/core/ports: full driven-port catalog per plan §3.3 —
  repositories as transaction-scoped aggregates whose inputs carry
  derived checks, audit, and events (§3.6), plus CommandExecutor,
  TargetResolver, Checker, Secrets, EventPublisher, Provisioner.
  Port-local payload types (Event, AuditEntry, CheckDef, KnowledgeEntry,
  ExecResult) keep signatures off infrastructure; TypeTree aliases
  internal/ontology (pure over domain) until checkdefaults is absorbed.
  ReadModels intentionally not declared yet — it materializes with the
  Phase 3 slice and grows as report handlers rewire.
- secrets.Backend is now an alias of ports.Secrets; implementations
  (Infisical, SOPS, Manager) unchanged. mcp's local secretBackend
  subset is deleted; tool constructors take ports.Secrets.
- internal/db → internal/adapters/postgres (mechanical import rewrite;
  package identifier stays db until the Phase 3 repository split).
  sqlc.yaml, Makefile, golangci exclusions, and docs follow the move;
  make generate-check verified.
- internal/adapters/ssh: Executor implements ports.CommandExecutor over
  the actuator dial pool + RunStreaming (10-min default timeout carried
  over from the httpapi path).
- internal/adapters/remote: Resolver implements ports.TargetResolver
  delegating to internal/remote (still pool-based; drops onto
  ports.EntityRepository when repositories land in Phase 3 — documented
  transitional import).
- internal/core/ports/portstest: importable fakes — in-memory
  EntityRepo (with check-then-act SetState, side-effect recording),
  RecordingExecutor, FakeChecker, SpyPublisher; port-satisfaction
  guards; tests.

Risk: ports are declared ahead of implementations — signatures firm up
per phase as slices land (documented in the package doc); the
remote→postgres transitional import is explicit and dissolves in
Phase 3.

Verification: go vet, make test (race, 19 packages), generate-check,
golangci on core+adapters — 0 issues; full-repo baseline down
365→344.

internal/httpapi/actuator.go

@@ -12,8 +12,8 @@ import (
 	"time"
 
 	"github.com/dtoro/oikos/internal/actuator"
-	"github.com/dtoro/oikos/internal/db"
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/execlog"
 	"github.com/dtoro/oikos/internal/observability"
 	"github.com/google/uuid"

internal/httpapi/api_test.go

@@ -16,7 +16,7 @@ import (
 	"testing"
 
 	"github.com/dtoro/oikos/internal/config"
-	"github.com/dtoro/oikos/internal/db"
+	"github.com/dtoro/oikos/internal/adapters/postgres"
 	"github.com/jackc/pgx/v5"
 )
 

internal/httpapi/approval_rules.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/approvals.go

@@ -7,7 +7,7 @@ import (
 	"log/slog"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/autonomy.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/checks.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/client_lifecycle.go

@@ -9,7 +9,7 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/default_checks.go

@@ -3,7 +3,7 @@ package httpapi
 import (
 	"context"
 
-	"github.com/dtoro/oikos/internal/db"
+	"github.com/dtoro/oikos/internal/adapters/postgres"
 	"github.com/google/uuid"
 	"github.com/jackc/pgx/v5"
 )

internal/httpapi/entities.go

@@ -6,7 +6,7 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/google/uuid"
 )

internal/httpapi/entity_mutations.go

@@ -9,8 +9,8 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/dtoro/oikos/internal/db"
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/entity_types.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/executions.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/fleet_health.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db"
+	"github.com/dtoro/oikos/internal/adapters/postgres"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 )
 

internal/httpapi/impl.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/google/uuid"

internal/httpapi/ontology.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 )
 

internal/httpapi/patterns.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/relationships.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/server.go

@@ -25,7 +25,7 @@ import (
 
 	"github.com/dtoro/oikos/internal/actuator"
 	"github.com/dtoro/oikos/internal/config"
-	"github.com/dtoro/oikos/internal/db"
+	"github.com/dtoro/oikos/internal/adapters/postgres"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	mcphandler "github.com/dtoro/oikos/internal/mcp"
 	"github.com/dtoro/oikos/internal/safego"

internal/httpapi/skills.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"log/slog"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/core/domain"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/dtoro/oikos/internal/observability"

internal/httpapi/sse.go

@@ -11,7 +11,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/dtoro/oikos/internal/db/sqlcgen"
+	"github.com/dtoro/oikos/internal/adapters/postgres/sqlcgen"
 	"github.com/dtoro/oikos/internal/httpapi/gen"
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"