feat: expose workflow console api and RPC service with @effect/rpc

- Replace manual JSON-RPC protocol handling with @effect/rpc typed RPCs
- Add evidence capture layer (per-call Ref, response body buffering/reconstruction)
- Add service module with typed dispatch and layer composition via Layer.mergeAll
- Add Hono API with /api/health, /api/connect, /api/rpc routes
- Add browser DTO contracts, error mapping, body size limits
- Add 13 Hono route tests and 12 target-policy tests passing
- Delete old protocol.ts and protocol.test.ts (replaced by rpcs.ts/service.ts)

web/apps/console/vite.config.ts

@@ -5,6 +5,7 @@ export default defineConfig({
   plugins: [react()],
   server: {
     proxy: {
+      // Server must listen on this port (set via WEB_PORT env or default 8787)
       "/api": "http://127.0.0.1:8787",
     },
   },