add dev mode guards: skip FMCSA submission, fax, and web filing in non-production environments

scripts/workers/services/mcs150_update.py

@@ -186,8 +186,21 @@ class MCS150UpdateHandler:
                 LOG.error("[%s] E-sign setup failed (proceeding anyway): %s", order_number, exc)
 
         # Step 5: Submit electronically (3x web → fax fallback)
+        # GUARD: Skip actual submission in dev/test environments
+        is_production = os.environ.get("NODE_ENV") == "production" or os.environ.get("ENV") == "production"
         filing_result = None
-        if pdf_path:
+        if pdf_path and not is_production:
+            LOG.info("[%s] DEV MODE — skipping actual FMCSA submission", order_number)
+            filing_result = {
+                "success": True,
+                "method": "dev_skip",
+                "attested_pdf": None,
+                "submitted_at": datetime.now().isoformat(),
+                "screenshot_path": None,
+                "fax_log_id": None,
+                "error": None,
+            }
+        elif pdf_path:
             try:
                 import asyncio
                 from scripts.workers.fax_sender import submit_filing