discovery(mesh): graspologic ImportError log message says 'restart to enable' but loop now retries automatically

[mrveiss]

Gap

After #4924, the except ImportError handler in _start_community_clustering_loop() logs:

```
"graspologic not installed — community clustering disabled. "
"Install graspologic and restart to enable. Retrying in 24h. Error: %s"
```

The phrase "restart to enable" is now wrong. The whole point of #4924 was that a restart is no longer needed — the loop retries automatically every 24 hours. The current message gives operators incorrect recovery instructions.

The same wrong string is hardcoded in the test at community_clusterer_test.py:240.

Location

• autobot-backend/initialization/lifespan.py — _start_community_clustering_loop()._loop(), line 1282
• autobot-backend/services/mesh_brain/community_clusterer_test.py — line 240 (test asserts the exact string)

Fix

Change the message to remove the restart instruction:

```python
logger.warning(
"graspologic not installed — community clustering paused. "
"Install with: pip install graspologic. Retrying in 24h. Error: %s",
exc,
)
```

Update the test assertion to match the corrected string.

Acceptance Criteria

• Log message does not mention "restart"
• Message accurately describes the auto-retry behavior
• Test updated to assert the corrected string

[mrveiss]

✅ Closed — already fixed in Dev_new_gui at commit 0f9d299: log message updated — graspologic now auto-retries