feat(geo): switch geocoder from self-host Photon to OpenCage API

logic_geo проксирует OpenCage (suggest/geocode/reverse): env OPENCAGE_API_KEY,
OPENCAGE_URL, OPENCAGE_TIMEOUT_MS, OPENCAGE_COUNTRYCODE, OPENCAGE_THROTTLE_RPS
(1 rps под free-тариф, 0 - выключить). HTTP 402/403/429 апстрима ->
503 geo_unavailable; source=opencage. Сервис photon и volume photon-data
удалены из swarm compose; eunit-фикстуры под формат OpenCage.

Refs EventHub/EventHubBack#77

docker/.env.example

@@ -43,8 +43,7 @@ REMINDER_LEAD_HOURS=24
 # Uploads (avatar/cover) — каталог на volume /app/data (Back#71)
 UPLOAD_DIR=/app/data/uploads
 UPLOAD_MAX_BYTES=2097152
-# Photon (DevOps#16). Пусто = /v1/geo → 503. Включить: PHOTON_REPLICAS=1 и PHOTON_URL=http://photon:2322
-PHOTON_URL=
-PHOTON_TIMEOUT_MS=3000
-PHOTON_REPLICAS=0
+# OpenCage (DevOps#16). ������ ���� = /v1/geo -> 503 (degrade). Free: 2500/�����, 1 rps.
+OPENCAGE_API_KEY=
+OPENCAGE_TIMEOUT_MS=3000
 

docker/docker-compose.swarm.yml

@@ -70,8 +70,8 @@ services:
       - ADMIN_SUPPORT_PASSWORD=${ADMIN_SUPPORT_PASSWORD}
       - CLUSTER_MODE=true
       - DNS_NAME=eventhub-node
-      - PHOTON_URL=${PHOTON_URL:-}
-      - PHOTON_TIMEOUT_MS=${PHOTON_TIMEOUT_MS:-3000}
+      - OPENCAGE_API_KEY=${OPENCAGE_API_KEY:-}
+      - OPENCAGE_TIMEOUT_MS=${OPENCAGE_TIMEOUT_MS:-3000}
     networks:
       eventhub-net:
         aliases:
@@ -235,29 +235,6 @@ services:
         max_attempts: 3
         window: 120s
 
-  # OSM geocoder (komoot Photon). Internal only — do not publish :2322.
-  # Default replicas 0. Enable: PHOTON_REPLICAS=1 PHOTON_URL=http://photon:2322
-  photon:
-    image: ${PHOTON_IMAGE:-rtuszik/photon-docker:latest}
-    environment:
-      - REGION=${PHOTON_REGION:-russia}
-      - UPDATE_STRATEGY=${PHOTON_UPDATE_STRATEGY:-PARALLEL}
-    volumes:
-      - photon-data:/photon/data
-    networks:
-      eventhub-net:
-        aliases:
-          - photon
-    deploy:
-      replicas: ${PHOTON_REPLICAS:-0}
-      resources:
-        limits:
-          memory: ${PHOTON_MEMORY_LIMIT:-1536M}
-        reservations:
-          memory: 128M
-      restart_policy:
-        condition: any
-
 networks:
   eventhub-net:
     driver: overlay
@@ -268,5 +245,4 @@ volumes:
   prometheus-data:
   grafana-data:
   traefik-logs:
-  loglynx-data:
-  photon-data:
+  loglynx-data: