Add full Docker image defaults, fix actor deadlocks, and improve dev experience

- Add Dockerfile.full and --all flag to install-agent CLI for pre-built images
- Centralize Docker image constant (FULL_IMAGE) pinned to 0.3.1-full
- Remove examples/shared/Dockerfile{,.dev} and daytona snapshot example
- Expand Docker docs with full runnable Dockerfile
- Fix self-deadlock in createWorkbenchSession (fire-and-forget provisioning)
- Audit and convert 12 task actions from wait:true to wait:false
- Add bun --hot for dev backend hot reload
- Remove --force from pnpm install in dev Dockerfile for faster startup
- Add env_file support to compose.dev.yaml for automatic credential loading
- Add mock frontend compose config and dev panel
- Update CLAUDE.md with wait:true policy and dev environment setup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

foundry/compose.mock.yaml

@@ -0,0 +1,32 @@
+name: foundry-mock
+
+services:
+  frontend:
+    build:
+      context: ..
+      dockerfile: foundry/docker/frontend.dev.Dockerfile
+    working_dir: /app
+    environment:
+      HOME: "/tmp"
+      FOUNDRY_FRONTEND_CLIENT_MODE: "mock"
+    ports:
+      - "4174:4174"
+    command: ["bash", "-lc", "pnpm install --force --frozen-lockfile --filter @sandbox-agent/foundry-frontend... && cd foundry/packages/frontend && exec pnpm vite --host 0.0.0.0 --port 4174"]
+    volumes:
+      - "..:/app"
+      - "./.foundry:/app/foundry/.foundry"
+      - "../../../task/rivet-checkout:/task/rivet-checkout:ro"
+      - "mock_node_modules:/app/node_modules"
+      - "mock_client_node_modules:/app/foundry/packages/client/node_modules"
+      - "mock_frontend_errors_node_modules:/app/foundry/packages/frontend-errors/node_modules"
+      - "mock_frontend_node_modules:/app/foundry/packages/frontend/node_modules"
+      - "mock_shared_node_modules:/app/foundry/packages/shared/node_modules"
+      - "mock_pnpm_store:/tmp/.local/share/pnpm/store"
+
+volumes:
+  mock_node_modules: {}
+  mock_client_node_modules: {}
+  mock_frontend_errors_node_modules: {}
+  mock_frontend_node_modules: {}
+  mock_shared_node_modules: {}
+  mock_pnpm_store: {}