[ingest/adapters/chatlog.py] Fix 4 audit issues

[voidfreud]

🟠 HIGH

• ChatGPT messages NOT in chronological order: Iterates .values() (arbitrary dict insertion order) instead of sorting by timestamp. Messages appear in wrong order. (Lines 47-65, Audit 6)

🟡 MEDIUM

• Uses Any type for _detect_format data parameter: (Lines 5,11,26, Audit 7)
• messages: list[dict[str, str]] — plain dicts cross module boundary: Should use TypedDict. (Lines 28,74, Audit 7)

[voidfreud]

Fixed in M001/S06: chatlog adapter now catches JSONDecodeError, OSError, and unrecognized formats, returning IngestResult(status='error'). Commit 6b29782.