Enhance FMCSA flagger: for-hire as deficiency, zero fleet detection

- For-hire carriers now flagged with issues (BOC-3/UCR/insurance needed)
- Zero trucks/drivers flagged as stale data
- For-hire + MCS-150 overdue = critical severity
- Actionable flags count excludes zero_fleet (informational only)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/workers/fmcsa_deficiency_flagger.py

@@ -125,6 +125,8 @@ def flag_carriers(dry_run: bool = False) -> dict:
         # For-hire carrier — needs BOC-3, UCR, insurance
         if for_hire:
             flags.append("for_hire_carrier")
+            issues.append("For-hire carrier — BOC-3, UCR registration, and liability insurance required")
+            severity = "major" if severity == "none" else severity
             stats["for_hire"] += 1
 
         # Hazmat — needs PHMSA registration
@@ -134,8 +136,25 @@ def flag_carriers(dry_run: bool = False) -> dict:
             severity = "major" if severity in ("none", "minor") else severity
             stats["hazmat"] += 1
 
-        # Determine campaign eligibility
-        deficiency_count = len([f for f in flags if f not in ("for_hire_carrier",)])
+        # Zero trucks/drivers — possibly inactive or data stale
+        if (trucks is not None and trucks == 0) or (drivers is not None and drivers == 0):
+            flags.append("zero_fleet")
+            issues.append("Zero trucks or drivers on file — update your MCS-150 if still operating")
+            stats.setdefault("zero_fleet", 0)
+            stats["zero_fleet"] += 1
+
+        # New entrant (registered in last 18 months) — needs safety audit prep
+        # add_date is stored as text like "01-JAN-25"
+        # We can't easily parse all formats here, so use mcs150_parsed as a proxy
+        # for recent registration if the carrier has very few inspections
+
+        # Determine campaign eligibility — any real issue makes them eligible
+        # For-hire + MCS-150 overdue = critical (they need everything)
+        if for_hire and "mcs150_overdue" in flags:
+            severity = "critical"
+
+        actionable_flags = [f for f in flags if f != "zero_fleet"]
+        deficiency_count = len(actionable_flags)
         campaign_eligible = deficiency_count > 0 and bool(email)
 
         if campaign_eligible: