refactor: nuke dead exports, dead files, dead DB column, dead zero-value wrappers

Full-codebase ts-prune + manual audit sweep. Every change below is a pure
deletion (or a 2-line re-wire where a dead function was supposed to be
alive). No scope additions.

Dead wrappers / phantom features
  - shouldAutoApproveApproval: zero-value wrapper over shouldAutoApprove.
    Four call sites now import shouldAutoApprove from execution-policy
    directly.
  - evaluateRotation(session, connectorId, thresholdsOverride): the
    connectorId arg was never read (underscored), and thresholdsOverride
    was only exercised by the test suite — no production caller. Signature
    collapses to evaluateRotation(session). DEFAULT_THRESHOLDS /
    RotationThresholds exports and their tests go with it.
  - installLogRedactor: defensive console wrapper that was never wired
    from worker-entry. buildRedactor handles the known threat (env-value
    leaks); the pattern-based redactTokens stays for tests and future
    composition.

Dead files
  - resume-interrupted-tasks.ts: helper function never imported.
  - service-graph-orchestration-deps.ts: three factory closures
    superseded by the inline closures in create-orchestration-service.

Dead exports
  - listConnectorsByAuthKind (shared/connector-catalog)
  - getLocalePromptInstruction + whole localization.ts file
  - ImportantDocType
  - main-side ConnectorAuthKind (duplicated the shared one; not referenced)
  - CheckpointEngineService, RunHousekeepingService types
  - WorkspaceResolution type
  - cmdOrCtrlSymbol
  - AgentEventPush, CredentialPayload type aliases
  - parseApprovalPayloadJson, parseEnvValue, ProviderCard
  - getSOP — buildSOPSection reads the SOPS map directly; the individual
    getter had no callers. Deduped to a flat array.
  - renderWakeReason in wake-reasons/en.ts: byte-for-byte duplicate of the
    one in wake-reasons/index.ts.

Forgotten wiring (not cleanup, but adjacent)
  - registerAgentStandupRoute: the GET /api/agents/me/standup endpoint is
    advertised in every system prompt and wake-reason doc, but the route
    handler was never registered in api-server/index.ts. Agents have been
    hitting 404 since Pi Mono. Registered.

Dead DB column
  - v44 migration drops runs.context_snapshot_json. Column was added by
    v16-v25, never written or read, and v43's deliberate preservation
    was an interim measure. Same idempotent table-rebuild pattern as
    v41/v43.

Test tree
  - Phantom-feature threshold override tests removed (3). The rest of
    the rotation suite re-expressed against the real maxRuns=20 floor.

495/495 unit tests pass. typecheck + build clean.

src/main/database/schema.ts

@@ -8,6 +8,7 @@ import { createMigrationsV40V40 } from "./migrations/v40-v40";
 import { createMigrationsV41V41 } from "./migrations/v41-v41";
 import { createMigrationsV42V42 } from "./migrations/v42-v42";
 import { createMigrationsV43V43 } from "./migrations/v43-v43";
+import { createMigrationsV44V44 } from "./migrations/v44-v44";
 import {
   columnExists,
   nowIso,
@@ -182,6 +183,7 @@ export function runMigrations(
     ...createMigrationsV41V41(deps),
     ...createMigrationsV42V42(deps),
     ...createMigrationsV43V43(deps),
+    ...createMigrationsV44V44(deps),
   ];
 
   for (const migration of migrations) {