Add conditional RAG reindex after session summarization

When summarize-transcript.py extracts items to memory files, it now
triggers index_personal.py to update the RAG search index. Only runs
when items were actually added (total_added > 0) to avoid unnecessary
reindexing on trivial sessions.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

hooks/scripts/summarize-transcript.py

@@ -378,6 +378,29 @@ def main():
 
     log(f"Summarization complete: {total_added} total items added")
 
+    # Reindex RAG if we added items
+    if total_added > 0:
+        log("Triggering RAG reindex...")
+        try:
+            reindex_result = subprocess.run(
+                [
+                    str(Path.home() / ".claude/skills/rag-search/venv/bin/python"),
+                    str(Path.home() / ".claude/skills/rag-search/scripts/index_personal.py"),
+                    "--quiet"
+                ],
+                capture_output=True,
+                text=True,
+                timeout=120
+            )
+            if reindex_result.returncode == 0:
+                log("RAG reindex completed successfully")
+            else:
+                log(f"RAG reindex failed: {reindex_result.stderr[:200]}")
+        except subprocess.TimeoutExpired:
+            log("RAG reindex timed out after 120s")
+        except Exception as e:
+            log(f"RAG reindex error: {e}")
+
 
 if __name__ == "__main__":
     main()