Run Reddit and X searches in parallel, fix timeout handling

- Refactor run_research() to use ThreadPoolExecutor for parallel execution
- Reddit timeout/crash no longer blocks X search from running
- Add catch for ConnectionResetError/OSError in http.py
- Per-item error handling in Reddit enrichment (one failure doesn't crash all)
- Increase API timeouts from 60/90/120 to 90/120/180 seconds
- Add ClawdBot setup example to README

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

scripts/lib/http.py

@@ -102,6 +102,12 @@ def request(
             log(f"JSON decode error: {e}")
             last_error = HTTPError(f"Invalid JSON response: {e}")
             raise last_error
+        except (OSError, TimeoutError, ConnectionResetError) as e:
+            # Handle socket-level errors (connection reset, timeout, etc.)
+            log(f"Connection error: {type(e).__name__}: {e}")
+            last_error = HTTPError(f"Connection error: {type(e).__name__}: {e}")
+            if attempt < retries - 1:
+                time.sleep(RETRY_DELAY * (attempt + 1))
 
     if last_error:
         raise last_error