cdr: store Cdr events, aggregate calls, fixtures from real calls

services/cdr.ts stores every AMI Cdr event in cdr and, 5 s after a
call's last event, builds its calls row (direction, status, from, to,
DID, answered by, talk time) and call_extensions (caller, rang,
answered) per 04 §5.4; linkedids without a calls row are caught up on
AMI connect. Aggregation is idempotent.

test/asterisk/cdr-record.ts records 8 scenarios with our config, the
fake voip.ms (now shared in provider.ts) and baresip phones; each has a
fixture and a test with the expected calls row. Queue abandon and park
come with M8.

Found while recording: Asterisk 24's Cdr event has no LinkedID unless
cdr_manager maps it, its times carry no zone (now usegmtime), and the
mappings read CDR variables, so the dialplan sets CDR(SP_DID) and
CDR(SP_DIRECTION) next to the channel variables. The Asterisk image
needs a rebuild for the cdr_manager.conf change.

Task: M7-T1

apps/api/test/fixtures/cdr/transfer.json

@@ -0,0 +1,54 @@
+[
+  {
+    "Event": "Cdr",
+    "Privilege": "cdr,all",
+    "AccountCode": "",
+    "Source": "13125559999",
+    "Destination": "101",
+    "DestinationContext": "sp-local-numbers",
+    "CallerID": "\"Mobile\" <13125559999>",
+    "Channel": "PJSIP/trunk-7d3e9a52-1c4b-4f6e-9a0d-2b8c5e1f4a37-0000000d",
+    "DestinationChannel": "PJSIP/101-0000000e",
+    "LastApplication": "Dial",
+    "LastData": "PJSIP/101/sip:101-0x5f231650d0b0@172.21.0.4:5070,25,tx",
+    "StartTime": "2026-10-18 19:34:10",
+    "AnswerTime": "2026-10-18 19:34:10",
+    "EndTime": "2026-10-18 19:34:13",
+    "Duration": "3",
+    "BillableSeconds": "3",
+    "Disposition": "ANSWERED",
+    "AMAFlags": "DOCUMENTATION",
+    "UniqueID": "1792352050.30",
+    "UserField": "",
+    "LinkedID": "1792352050.30",
+    "sp_did": "13125551234",
+    "sp_direction": "inbound",
+    "sp_recording": ""
+  },
+  {
+    "Event": "Cdr",
+    "Privilege": "cdr,all",
+    "AccountCode": "",
+    "Source": "13125559999",
+    "Destination": "101",
+    "DestinationContext": "sp-local-numbers",
+    "CallerID": "\"Mobile\" <13125559999>",
+    "Channel": "PJSIP/trunk-7d3e9a52-1c4b-4f6e-9a0d-2b8c5e1f4a37-0000000d",
+    "DestinationChannel": "PJSIP/103-0000000f",
+    "LastApplication": "Dial",
+    "LastData": "PJSIP/103/sip:103-0x5fa815eee0b0@172.21.0.4:5074,25,tx",
+    "StartTime": "2026-10-18 19:34:13",
+    "AnswerTime": "2026-10-18 19:34:13",
+    "EndTime": "2026-10-18 19:34:18",
+    "Duration": "4",
+    "BillableSeconds": "4",
+    "Disposition": "ANSWERED",
+    "AMAFlags": "DOCUMENTATION",
+    "UniqueID": "1792352050.30",
+    "UserField": "",
+    "LinkedID": "1792352050.30",
+    "sp_did": "13125551234",
+    "sp_direction": "inbound",
+    "sp_recording": ""
+  }
+]