feat(delegate-job): bump default --timeout 600s -> 3600s (1h wall-clock budget)

Changed 11 locations across 5 files:
- scripts/registry.py: timeout_sec dataclass default + argparse default
- scripts/job_subscriber.py: help text + fallback default
- SKILL.md: 4 recommended invocation examples
- registry.md: JSON example + CLI example
- tmux-agent-orchestrate-delegate-job: bash wrapper TIMEOUT var

--idle-timeout 120s preserved unchanged.
Rationale: 10min default was too short for deep analysis / multi-file
generation tasks; 1h aligns with long-running agent delegation patterns.

skills/tmux-agent-orchestrate-delegate-job/registry.md

@@ -46,7 +46,7 @@ Reference implementation: [`./scripts/registry.py`](./scripts/registry.py)
     "password": null
   },
   "topic_prefix": "python/mqtt/jobs/abc12345",
-  "timeout_sec": 600,
+  "timeout_sec": 3600,
   "idle_timeout_sec": 120,
   "expected_artifacts": ["sort_problems.md"],
   "last_seq": 0,
@@ -127,7 +127,7 @@ SQLite transaction when you migrate.
 ```bash
 PY=.venv/bin/python
 $PY scripts/registry.py register --prompt "…" --agent claude-code \
-    --agent-session tmux:claude --timeout 600 --idle-timeout 120   # → prints job_id
+    --agent-session tmux:claude --timeout 3600 --idle-timeout 120   # → prints job_id
 $PY scripts/registry.py list                                       # human table
 $PY scripts/registry.py list --json                                # full records
 $PY scripts/registry.py get    --job <id>                          # one record