Merge lane/abrechnung in feature/craftvia-mvp

Konflikte gelöst (additiv): Benachrichtigungstexte (Planung + Meilensteine), Event-Typen,
Navigation, Job-Queues/Prozessoren (geocode-site, planning-watch, billing-pdf), OpenAPI-Tags,
Smoke-Prüfungen (zweiter Mandant: Planung + Abrechnung).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

messages/en/notifications.json

@@ -51,7 +51,10 @@
     "time_rejected": "Time rejected",
     "planning_capacity_freed": "Finished early",
     "planning_overrun": "Planned duration exceeded",
-    "planning_followup_at_risk": "Follow-up order at risk"
+    "planning_followup_at_risk": "Follow-up order at risk",
+    "milestone_reached": "Milestone reached",
+    "milestone_confirmed": "Milestone confirmed",
+    "milestone_rejected": "Milestone rejected"
   },
   "events": {
     "work_order_assigned": {
@@ -145,6 +148,18 @@
     "planning_followup_at_risk": {
       "title": "Follow-up order at risk: {number}",
       "message": "{title} – {customer} ({team}) is at risk due to the delay of {blocker}."
+    },
+    "milestone_reached": {
+      "title": "Milestone reached: {number}",
+      "message": "{actor} reports a milestone of {number} as reached. Please confirm."
+    },
+    "milestone_confirmed": {
+      "title": "Milestone confirmed: {number}",
+      "message": "{actor} confirmed your reported milestone of {number}."
+    },
+    "milestone_rejected": {
+      "title": "Milestone rejected: {number}",
+      "message": "{actor} rejected your reported milestone of {number}: {reason}"
     }
   },
   "fallback": {