session-memory Phase 1: Grok adapter (T02)

- adapters/grok.py: reads the per-session dir (summary.json + chat_history.jsonl
  + events.jsonl + updates.jsonl); conversation from chat_history, lifecycle/
  turn from events, tool-call names paired in order from updates ACP stream
- registered in ingest dispatch; codex+grok sources enabled in config.toml
- tests/test_grok_adapter.py (synthetic + real local sessions)
- live multi-flavor dry-run discovers 89 sessions across flavors

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

workplans/AGENTIC-WP-0003-session-memory-phase1.md

@@ -52,7 +52,7 @@ order (no native DAG). Version-detect on `session_meta.cli_version`. Reuse the
 
 ```task
 id: AGENTIC-WP-0003-T02
-status: progress
+status: done
 priority: high
 state_hub_task_id: "fe3d7d1c-110e-4f16-8d56-062fa4a651aa"
 ```