Improve exception handling patterns

- Replace bare except with specific Exception in git_repo.py
- Use try/except/else pattern for better flow in git_repo.py
- Replace logger.error with logger.exception in main.py for better error reporting

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

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

git_time_tracker/source/git_repo.py

@@ -13,9 +13,10 @@ logger = logging.getLogger(__name__)
 def determine_default_branch(repo: git.Repo):
     try:
         repo.commit('main')
-        return 'main'
-    except:
+    except Exception:
         return 'master'
+    else:
+        return 'main'
 
 
 def determine_project_name(repo: git.Repo) -> str:

personal_data/main.py

@@ -144,7 +144,7 @@ def main(
                 del result
         except requests.exceptions.HTTPError as e:
             logger.exception('Failed in running %s', scraper_cls.__name__)
-            logger.error('User-Agent: %s', e.request.headers['user-agent'])
+            logger.exception('User-Agent: %s', e.request.headers['user-agent'])
             continue
         status = util.extend_csv_file(
             OUTPUT_PATH / f'{scraper.dataset_name}.csv',