feat(voice): auto-populate name from known customer on repeat calls

When a new voice session starts and the customer already has a trusted
display_name on file (e.g. from a previous call), automatically set
name_status to 'name_obtained' so the AI greets them by name instead
of asking again.

services/ai_orchestrator_service/voice.py

@@ -1664,6 +1664,21 @@ def start_voice_session(session_id: str, payload: VoiceAIStartIn) -> VoiceAIStar
         )
         name_source = str(voice_session.customer_name_source or "none").strip() or "none"
         name_resolved_at = str(voice_session.customer_name_resolved_at or "").strip() or None
+        if name_status == "name_not_obtained" and not name_value:
+            caller_number, caller_name = _resolve_caller_from_call(session, payload.call_id)
+            if _display_name_looks_trusted(customer, caller_number, caller_name):
+                name_status = "name_obtained"
+                name_value = customer.display_name
+                name_source = "known_customer"
+                name_resolved_at = now
+                _persist_voice_name_state(
+                    session,
+                    voice_session=voice_session,
+                    status=name_status,
+                    value=name_value,
+                    source=name_source,
+                    resolved_at=name_resolved_at,
+                )
         if name_status == "name_obtained" and name_value:
             finalized_name = _finalize_customer_name(
                 session,