FG Scan form validation improvements with warehouse module updates

- Fixed 3 JavaScript syntax errors in fg_scan.html (lines 951, 840-950, 1175-1215)
- Restored form field validation with proper null safety checks
- Re-enabled auto-advance between form fields
- Re-enabled CP code auto-complete with hyphen detection
- Updated validation error messages with clear format specifications and examples
- Added autocomplete='off' to all input fields
- Removed auto-prefix correction feature
- Updated warehouse routes and modules for box assignment workflow
- Added/improved database initialization scripts
- Updated requirements.txt dependencies

Format specifications implemented:
- Operator Code: OP + 2 digits (example: OP01, OP99)
- CP Code: CP + 8 digits + hyphen + 4 digits (example: CP00000000-0001)
- OC1/OC2 Codes: OC + 2 digits (example: OC01, OC99)
- Defect Code: 3 digits only

requirements.txt

@@ -7,3 +7,6 @@ DBUtils==3.0.3
 requests==2.31.0
 Markdown==3.5.1
 APScheduler==3.10.4
+reportlab==4.0.7
+python-barcode==0.15.1
+Flask-Session==0.5.0