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)

requirements.txt

@@ -1,22 +1,14 @@
-autopep8
-et-xmlfile
-numpy
-openpyxl
-pandas
-pycodestyle
-python-dateutil
-pytz
-selenium
-six
-toml
-urllib3
 aiohttp
+googlemaps
 instagrapi
 jsonpickle
-tweepy
-sqlalchemy
-googlemaps
 moviepy
 mysqlclient
-mysql-connector-python
-pymysql
+openpyxl
+pandas
+python-dateutil
+requests
+selenium
+sqlalchemy
+tweepy
+urllib3