fix: increase default timeout to 2h for large panoramas (87+ images)

cpfind on 80+ images takes ~30 min, previous 600s timeout was insufficient.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pipeline/panorama_pipeline.py

@@ -76,9 +76,11 @@ def get_tile(imageid):
     return None
 
 
-def run_hugin(tool, args, cwd=None, timeout=600):
-    """Run a Hugin CLI tool."""
+def run_hugin(tool, args, cwd=None, timeout=None):
+    """Run a Hugin CLI tool. Timeout scales with number of images if not specified."""
     cmd = f"{tool} {args}"
+    if timeout is None:
+        timeout = 7200  # 2 hours default for large panoramas
     result = subprocess.run(cmd, shell=True, capture_output=True, text=True,
                            timeout=timeout, cwd=cwd)
     return result