fix: default missing status field to OPEN in question formatting

Fix question extraction bug where AI-generated questions were being
filtered out due to missing 'status' field.

**Root Cause:**
The AI agents module returns questions without a 'status' field:
  {'participant': 'Bob', 'question': 'text', 'line': 'original'}

But format_questions_section() filtered for status == "OPEN":
  open_questions = [q for q in questions if q.get("status") == "OPEN"]

Since AI questions had no status, q.get("status") returned None,
which didn't match "OPEN", so questions were filtered out.

**Fix:**
Default missing status to "OPEN" in the filter:
  open_questions = [q for q in questions if q.get("status", "OPEN") == "OPEN"]

This makes the function defensive - questions without explicit status
are treated as OPEN, which matches the basic extraction behavior.

**Impact:**
- Questions extracted by AI agents now appear in summaries
- Maintains backward compatibility with basic extraction (has status)
- All 18 tests now pass (was 17/18)

**Testing:**
- Verified with test_run_status_updates_summary_sections
- Question "What is the rollout plan?" now correctly appears in summary
- No regressions in other tests

Resolves test failure identified in comprehensive project review.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

automation/summary.py

@@ -85,7 +85,8 @@ def format_questions_section(questions: list[dict[str, Any]]) -> str:
 
     # Split questions by status so OPEN items stay at the top and partial answers
     # can be rendered with their follow-up context.
-    open_questions = [q for q in questions if q.get("status") == "OPEN"]
+    # Default to "OPEN" if status field is missing (for AI-extracted questions)
+    open_questions = [q for q in questions if q.get("status", "OPEN") == "OPEN"]
     partial_questions = [q for q in questions if q.get("status") == "PARTIAL"]
 
     if open_questions: