Refactor: repo hygiene, shared utils, focused tests, and CI improvements

- Remove dead imports/duplication from Google2xls.py and social.py
- Centralize shared logic in review_workflow_utils.py
- Add focused posting-flow tests in tests/test_social.py (all pass)
- Update .gitignore for secrets and local artifacts
- Trim requirements.txt to direct deps
- Improve CI: compile all scripts, run focused tests
- Prep repo for clean commit (no secrets, no local artifacts)

tests/test_social.py

@@ -0,0 +1,50 @@
+import unittest
+from unittest.mock import patch, MagicMock
+import social
+
+class SocialPostingFlowTests(unittest.TestCase):
+    def setUp(self):
+        # Patch env and Posts for isolation
+        self.env_patch = patch('social.env')
+        self.mock_env = self.env_patch.start()
+        self.mock_env.request_timeout = 1
+        self.mock_env.facebooksleep = 0
+        self.mock_env.forcegoogleupdate = False
+        self.mock_env.xls = 'dummy.xlsx'
+        self.mock_env.mariadb = False
+        self.mock_env.mariadbuser = 'user'
+        self.mock_env.mariadbpass = 'pass'
+        self.mock_env.mariadbserver = 'localhost'
+        self.mock_env.mariadbdb = 'db'
+        self.mock_env.needreversed = False
+        self.mock_env.postssession = MagicMock()
+        self.mock_env.posts = []
+        self.mock_env.xlsdf = MagicMock()
+        self.mock_env.posts = []
+        self.mock_env.postssession.query.return_value.count.return_value = 0
+        self.addCleanup(self.env_patch.stop)
+
+    @patch('social.requests.post')
+    @patch('builtins.open', new_callable=MagicMock)
+    def test_post_facebook_video_handles_success(self, mock_open, mock_post):
+        mock_post.return_value.json.return_value = {'id': '123'}
+        mock_open.return_value.__enter__.return_value = MagicMock()
+        result = social.post_facebook_video('groupid', ['video.mp4'], 'token', 'title', 'content', 'date', 'rating', 'address')
+        self.assertEqual(result, {'id': '123'})
+
+    @patch('social.requests.post', side_effect=AttributeError('fail'))
+    @patch('builtins.open', new_callable=MagicMock)
+    def test_post_facebook_video_handles_error(self, mock_open, mock_post):
+        mock_open.return_value.__enter__.return_value = MagicMock()
+        result = social.post_facebook_video('groupid', ['video.mp4'], 'token', 'title', 'content', 'date', 'rating', 'address')
+        self.assertFalse(result)
+
+    def test_write_to_database_handles_empty(self):
+        # Should not raise
+        data = []
+        local_outputs = {'xlsdf': MagicMock(), 'posts': [], 'postssession': MagicMock()}
+        result = social.write_to_database(data, local_outputs)
+        self.assertEqual(result, data)
+
+if __name__ == '__main__':
+    unittest.main()