Docs: Consolidate admin documentation and migrate reference data

- Created LOCAL_DEVELOPMENT_GUIDE.md and DEPLOYMENT_GUIDE_MANUAL.md from legacy txt files.
- Migrated country/time_zone data and requirements.txt to documentation/reference_data/.
- Removed redundant admin/documentation/ and admin/data_files/ directories.
- Enhanced app/lib_schema_v3.py to explicitly capture 'required' fields from DB 'NOT NULL' constraint.
- Added verification tests for schema logic and standalone DB connectivity.

tests/test_lib_schema_isolated.py

@@ -0,0 +1,44 @@
+import sys
+import os
+import json
+from unittest.mock import MagicMock
+
+# Add current directory to path
+sys.path.append(os.getcwd())
+
+# 1. Mock EVERYTHING before importing the target
+mock_config = MagicMock()
+mock_config.settings = MagicMock()
+sys.modules["app.config"] = mock_config
+
+mock_db = MagicMock()
+sys.modules["app.db_sql"] = MagicMock(db=mock_db)
+
+# 2. Mock DESCRIBE result
+mock_row = [
+    ("created_on", "timestamp", "NO", "", "current_timestamp()", "")
+]
+mock_db.execute.return_value.fetchall.return_value = mock_row
+
+# 3. Import and test
+from app.lib_schema_v3 import get_object_schema_info
+
+def test_isolated_logic():
+    # We need to mock obj_type_kv_li as well
+    import app.lib_schema_v3
+    app.lib_schema_v3.obj_type_kv_li = {"journal": {"tbl": "journal", "mdl": MagicMock()}}
+    
+    print("Testing isolated logic for get_object_schema_info...")
+    info = get_object_schema_info("journal")
+    
+    col = info["database"]["columns"][0]
+    print(f"Resulting column info: {json.dumps(col, indent=2)}")
+    
+    assert col["field"] == "created_on"
+    assert col["db_type"] == "timestamp"
+    assert col["required"] is True
+    assert col["db_default"] == "current_timestamp()"
+    print("\nIsolated test passed! The logic in lib_schema_v3 is correct.")
+
+if __name__ == "__main__":
+    test_isolated_logic()