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/adapters/postgres/sqlcgen/ontology.sql.go

@@ -0,0 +1,132 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.29.0
+// source: ontology.sql
+
+package sqlcgen
+
+import (
+	"context"
+)
+
+const getLifecycleForType = `-- name: GetLifecycleForType :one
+SELECT ld.id, ld.states, ld.default_state, ld.terminal_states, ld.transitions, ld.created_at FROM lifecycle_defs ld
+JOIN entity_types et ON et.lifecycle_id = ld.id
+WHERE et.name = $1
+`
+
+func (q *Queries) GetLifecycleForType(ctx context.Context, name string) (LifecycleDef, error) {
+	row := q.db.QueryRow(ctx, getLifecycleForType, name)
+	var i LifecycleDef
+	err := row.Scan(
+		&i.ID,
+		&i.States,
+		&i.DefaultState,
+		&i.TerminalStates,
+		&i.Transitions,
+		&i.CreatedAt,
+	)
+	return i, err
+}
+
+const listEntityTypes = `-- name: ListEntityTypes :many
+SELECT name, parent_type, is_abstract, domain, layer, description, lifecycle_id, attribute_schema, schema_version, status, created_at, updated_at, monitoring_spec FROM entity_types ORDER BY name
+`
+
+func (q *Queries) ListEntityTypes(ctx context.Context) ([]EntityType, error) {
+	rows, err := q.db.Query(ctx, listEntityTypes)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []EntityType
+	for rows.Next() {
+		var i EntityType
+		if err := rows.Scan(
+			&i.Name,
+			&i.ParentType,
+			&i.IsAbstract,
+			&i.Domain,
+			&i.Layer,
+			&i.Description,
+			&i.LifecycleID,
+			&i.AttributeSchema,
+			&i.SchemaVersion,
+			&i.Status,
+			&i.CreatedAt,
+			&i.UpdatedAt,
+			&i.MonitoringSpec,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const listLifecycleDefs = `-- name: ListLifecycleDefs :many
+SELECT id, states, default_state, terminal_states, transitions, created_at FROM lifecycle_defs ORDER BY id
+`
+
+func (q *Queries) ListLifecycleDefs(ctx context.Context) ([]LifecycleDef, error) {
+	rows, err := q.db.Query(ctx, listLifecycleDefs)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []LifecycleDef
+	for rows.Next() {
+		var i LifecycleDef
+		if err := rows.Scan(
+			&i.ID,
+			&i.States,
+			&i.DefaultState,
+			&i.TerminalStates,
+			&i.Transitions,
+			&i.CreatedAt,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const listRelationshipTypes = `-- name: ListRelationshipTypes :many
+SELECT name, inverse, source_type, target_type, cardinality, description, created_at, blast_direction FROM relationship_types ORDER BY name
+`
+
+func (q *Queries) ListRelationshipTypes(ctx context.Context) ([]RelationshipType, error) {
+	rows, err := q.db.Query(ctx, listRelationshipTypes)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []RelationshipType
+	for rows.Next() {
+		var i RelationshipType
+		if err := rows.Scan(
+			&i.Name,
+			&i.Inverse,
+			&i.SourceType,
+			&i.TargetType,
+			&i.Cardinality,
+			&i.Description,
+			&i.CreatedAt,
+			&i.BlastDirection,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}