0.22.0 — full MCP agent surface: 19 new tools, async run, session reliability

Stage 1 — Foundation:
- Target validation: iptables + systemctl/docker target-type gates
- Async run for long-running commands (sleep/wait/poll loops)
- audit_log.session_id plumbing (SQL, sqlcgen, 18 call sites)

Stage 2 — External agent observe (11 tools):
- get_dashboard_summary, get_ontology, list_checks, list_executions
- get_knowledge_revisions, get_knowledge_duplicates, get_knowledge_orphans
- list_knowledge_tags, list_entity_sessions, find_entities_by
- 3 resource templates: oikos://entity/{slug}, knowledge/{id}, execution/{id}

Stage 3 — Nomos reliability:
- complete_task(success) refused without verification (upgraded from warn)
- sessionHasPlan excludes replaced steps (forces propose_plan after reopen)
- Bash syntax validation in run() (rejects literal \n, flag-space typos)
- Scope gate in SOUL.md (ask before pivoting to unrelated subsystem)

Stage 4 — External agent act (9 mutation tools):
- ack_signal, resolve_signal, mute_signal, cancel_execution
- update_check, delete_knowledge, restore_knowledge
- merge_knowledge, rename_knowledge_tag

internal/db/sqlcgen/operations.sql.go

@@ -353,8 +353,8 @@ func (q *Queries) InsertApproval(ctx context.Context, arg InsertApprovalParams)
 
 const insertAuditEntry = `-- name: InsertAuditEntry :exec
 INSERT INTO audit_log (actor_type, actor_id, action, entity_id, method, path,
-                       status_code, detail, source_ip, correlation_id)
-VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
+                       status_code, detail, source_ip, correlation_id, session_id)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11)
 `
 
 type InsertAuditEntryParams struct {
@@ -368,6 +368,7 @@ type InsertAuditEntryParams struct {
 	Detail        []byte
 	SourceIp      *string
 	CorrelationID *string
+	SessionID     *uuid.UUID
 }
 
 func (q *Queries) InsertAuditEntry(ctx context.Context, arg InsertAuditEntryParams) error {
@@ -382,6 +383,7 @@ func (q *Queries) InsertAuditEntry(ctx context.Context, arg InsertAuditEntryPara
 		arg.Detail,
 		arg.SourceIp,
 		arg.CorrelationID,
+		arg.SessionID,
 	)
 	return err
 }