feat: Add Linux deployment scripts and server logs view

- Add deployment/linux/ with deploy.sh for deploying from Claude-Agent LXC to Windows server
- Add ServerLogsView.vue for viewing server logs from frontend
- Add shared/routes/system.py for system health endpoints
- Update CLAUDE.md with quick deploy instructions
- Improve Windows deployment scripts (ROA2WEB-Console.ps1)
- Fix OCR service validation and worker pool improvements
- Update environment config examples
- Various script permission and startup fixes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/modules/data_entry/services/ocr/ocr_worker_pool.py

@@ -75,9 +75,10 @@ class OCRWorkerPool:
         self._sync_lock = mp.Lock()
 
         # Register cleanup handlers
+        # NOTE: Only use atexit, NOT signal handlers!
+        # Signal handlers interfere with FastAPI's shutdown handling.
+        # FastAPI's shutdown event calls stop_job_worker() which calls shutdown().
         atexit.register(self._cleanup_on_exit)
-        signal.signal(signal.SIGTERM, self._signal_handler)
-        signal.signal(signal.SIGINT, self._signal_handler)
 
         self._initialized = True
         logger.info("[OCRWorkerPool] Singleton instance created")

backend/modules/data_entry/services/ocr/validation.py

@@ -1004,7 +1004,7 @@ class OCRValidationEngine:
             for replacement in candidates + all_digits:
                 candidate = cui_digits[:pos] + replacement + cui_digits[pos+1:]
                 if CUIChecksumRule.validate_checksum(candidate):
-                    print(f"[CUI Repair] Fixed {cui_digits} → {candidate} (position {pos}: {original_digit}→{replacement})", flush=True)
+                    print(f"[CUI Repair] Fixed {cui_digits} -> {candidate} (position {pos}: {original_digit}->{replacement})", flush=True)
                     return candidate
 
         # No single-digit fix found
@@ -1164,7 +1164,7 @@ class OCRValidationEngine:
         if CUIChecksumRule.validate_checksum(cui_digits):
             match = await lookup_cui_in_db(cui_digits)
             if match:
-                print(f"[Fuzzy CUI] Exact match found: {cui} → {match[0]} ({match[1]})", flush=True)
+                print(f"[Fuzzy CUI] Exact match found: {cui} -> {match[0]} ({match[1]})", flush=True)
                 return match
             # Valid checksum but not in DB - return as-is (it might be a new supplier)
             return None
@@ -1214,7 +1214,7 @@ class OCRValidationEngine:
                 # Check if this corrected CUI exists in database
                 match = await lookup_cui_in_db(candidate)
                 if match:
-                    print(f"[Fuzzy CUI] DB match: {cui} → {match[0]} ({match[1]}) [pos {pos}: {original_digit}→{replacement}]", flush=True)
+                    print(f"[Fuzzy CUI] DB match: {cui} -> {match[0]} ({match[1]}) [pos {pos}: {original_digit}->{replacement}]", flush=True)
                     return match
 
         # No match found in database
@@ -1269,7 +1269,7 @@ class OCRValidationEngine:
         if not name_words:
             return None
 
-        print(f"[Fuzzy Name] Searching for vendor: '{vendor_name}' → keywords: {name_words}", flush=True)
+        print(f"[Fuzzy Name] Searching for vendor: '{vendor_name}' -> keywords: {name_words}", flush=True)
 
         # Build search pattern - use first significant word
         primary_word = name_words[0]