Switch to PyMongo, update config and requirements, fix FTP extension

typo

- Replace Motor (async) with PyMongo (sync) in database manager - Update
environment variable names for FTP and MongoDB config - Remove unused
dependencies from requirements.txt - Fix file extension typo: .slg_v2 →
.sgl_v2 throughout code and docs - Add debug prints for MongoDB env vars
in config - Update FTP monitor to use correct file extension and PyMongo
- Adjust FastAPI descriptions for new extension

microservices/data-ingestion-service/requirements.txt

@@ -3,26 +3,12 @@ fastapi==0.104.1
 uvicorn==0.24.0
 pydantic==2.5.0
 
-# Database dependencies
-motor==3.3.2
+# Database dependencies - using PyMongo (sync) instead of Motor (async)
 pymongo==4.6.0
-redis==5.0.1
 
 # FTP handling
 ftputil==5.0.4
 
-# Data processing
-pandas==2.1.4
-numpy==1.25.2
-openpyxl==3.1.2
-xlrd==2.0.1
-
-# Async HTTP client
-httpx==0.25.2
-
-# Logging and monitoring
-structlog==23.2.0
-
 # Date/time utilities
 python-dateutil==2.8.2
 
@@ -31,5 +17,4 @@ typing-extensions==4.8.0
 
 # Development dependencies (optional)
 pytest==7.4.3
-pytest-asyncio==0.21.1
-pytest-cov==4.1.0
+pytest-asyncio==0.21.1