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/README_SA4CPS.md

@@ -9,10 +9,10 @@ The Data Ingestion Service provides comprehensive FTP monitoring and data proces
 ## Architecture
 
 ```
-ftp.sa4cps.pt (.slg_v2 files) 
+ftp.sa4cps.pt (.slg_v2 files)
     ↓
 FTP Monitor (polls every 5 minutes)
-    ↓  
+    ↓
 Data Processor (supports multiple formats)
     ↓
 Redis Publisher (3 topic channels)
@@ -84,9 +84,9 @@ Set these in the `docker-compose.yml`:
 environment:
   - FTP_SA4CPS_HOST=ftp.sa4cps.pt        # FTP server hostname
   - FTP_SA4CPS_PORT=21                   # FTP port (default: 21)
-  - FTP_SA4CPS_USERNAME=anonymous        # FTP username
+  - FTP_SA4CPS_USERNAME=                 # FTP username
   - FTP_SA4CPS_PASSWORD=                 # FTP password (empty for anonymous)
-  - FTP_SA4CPS_REMOTE_PATH=/            # Remote directory path
+  - FTP_SA4CPS_REMOTE_PATH=/             # Remote directory path
 ```
 
 ### Manual Configuration
@@ -101,7 +101,7 @@ configurator = SA4CPSConfigurator()
 # Create data source
 result = await configurator.create_sa4cps_data_source(
     username="your_username",
-    password="your_password", 
+    password="your_password",
     remote_path="/data/energy"
 )
 
@@ -144,7 +144,7 @@ timestamp,sensor_id,energy_kwh,power_w,voltage_v
 2024-01-15T10:01:00Z,SENSOR_001,1235.1,865.3,229.8
 ```
 
-### Space-Delimited Format  
+### Space-Delimited Format
 ```
 # Energy consumption data
 # System: Smart Grid Monitor
@@ -191,7 +191,7 @@ All processed data is converted to a standardized sensor reading format:
 ### sa4cps_energy_data
 Primary energy consumption and power readings:
 - Energy consumption (kWh, MWh)
-- Power readings (W, kW, MW)  
+- Power readings (W, kW, MW)
 - Efficiency metrics
 
 ### sa4cps_sensor_metrics
@@ -201,7 +201,7 @@ Sensor telemetry and environmental data:
 - Sensor status/diagnostics
 - System health metrics
 
-### sa4cps_raw_data  
+### sa4cps_raw_data
 Raw unprocessed data for debugging:
 - Original file content
 - Processing metadata
@@ -278,10 +278,10 @@ class CustomSA4CPSProcessor(DataProcessor):
     async def _process_slg_v2_line(self, line, header, metadata, line_idx):
         # Custom line processing logic
         processed = await super()._process_slg_v2_line(line, header, metadata, line_idx)
-        
+
         # Add custom fields
         processed['custom_field'] = 'custom_value'
-        
+
         return processed
 ```
 
@@ -295,4 +295,4 @@ For issues or questions:
 
 ## License
 
-This implementation is part of the SA4CPS project energy monitoring dashboard.
+This implementation is part of the SA4CPS project energy monitoring dashboard.