docs: scrub retired v3 references from agent instruction files

Drop mentions of the removed graphile/zod-worker background system, the deleted
zod-worker package, and the v3 coordinator from the repo's CLAUDE.md / AGENTS.md
guidance now that v3 execution is gone.

Author: ericallam

AGENTS.md

@@ -138,7 +138,6 @@ User API call -> Webapp routes -> Services -> RunEngine -> Redis Queue -> Superv
 - **internal-packages/redis**: Redis client creation utilities (ioredis)
 - **internal-packages/testcontainers**: Test helpers for Redis/PostgreSQL containers
 - **internal-packages/schedule-engine**: Durable cron scheduling
-- **internal-packages/zod-worker**: Graphile-worker wrapper (DEPRECATED - use redis-worker)
 
 ### v3 (engine V1) removed
 

apps/supervisor/CLAUDE.md

@@ -7,7 +7,7 @@ Node.js app that manages task execution containers. Receives work from the platf
 - `src/services/` - Core service logic
 - `src/workloadManager/` - Container orchestration abstraction (Docker or Kubernetes)
 - `src/workloadServer/` - HTTP server for workload communication (heartbeats, snapshots)
-- `src/clients/` - Platform communication (webapp/coordinator)
+- `src/clients/` - Platform communication (webapp)
 - `src/env.ts` - Environment configuration
 
 ## Architecture

apps/webapp/CLAUDE.md

@@ -91,8 +91,6 @@ Background job workers use `@trigger.dev/redis-worker`:
 - `app/v3/alertsWorker.server.ts`
 - `app/v3/batchTriggerWorker.server.ts`
 
-Do NOT add new jobs using zodworker/graphile-worker (legacy).
-
 ## Real-time
 
 - Socket.io: `app/v3/handleSocketIo.server.ts`, `app/v3/handleWebsockets.server.ts`

internal-packages/database/CLAUDE.md

@@ -10,7 +10,7 @@ Located at `prisma/schema.prisma`. Key models include TaskRun, BackgroundWorker,
 
 ```prisma
 enum RunEngineVersion {
-  V1  // Legacy (MarQS + Graphile) - DEPRECATED
+  V1  // Retired v3 engine - no longer executes; kept for historical rows and rejection
   V2  // Current (run-engine + redis-worker)
 }
 ```

packages/redis-worker/CLAUDE.md

@@ -1,6 +1,6 @@
 # Redis Worker
 
-`@trigger.dev/redis-worker` - custom Redis-based background job system. **This replaces graphile-worker/zodworker** for all new background job needs.
+`@trigger.dev/redis-worker` - custom Redis-based background job system. This is the background job system for the webapp and run engine.
 
 ## Key Files
 
@@ -12,7 +12,7 @@
 
 Used by the webapp for background jobs (alerting, batch processing, common tasks) and by the run engine for TTL expiration and batch operations.
 
-All new background jobs in the webapp should use redis-worker. Do NOT add new jobs to zodworker (`@internal/zodworker`) or graphile-worker.
+All background jobs in the webapp use redis-worker.
 
 ## Testing