prowlarr: add FlareSolverr, promote from _dev

Add a FlareSolverr service on an internal network so Prowlarr can
get past Cloudflare challenges on tagged indexers, and document the
indexer proxy setup. Rename prowlarr_dev to prowlarr.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

prowlarr/compose.yaml

@@ -0,0 +1,32 @@
+services:
+  prowlarr:
+    image: ${PROWLARR_IMAGE:-ghcr.io/hotio/prowlarr:release}
+    restart: ${PROWLARR_RESTART:-unless-stopped}
+    volumes:
+      - ${VOL_PATH:-/data}/prowlarr/config:/config
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - UMASK=002
+    ports:
+      - "${PROWLARR_PORT:-9696}:9696"
+    networks:
+      - proxy
+      - internal
+    depends_on:
+      - flaresolverr
+
+  flaresolverr:
+    image: ${FLARESOLVERR_IMAGE:-ghcr.io/flaresolverr/flaresolverr:latest}
+    restart: ${FLARESOLVERR_RESTART:-unless-stopped}
+    environment:
+      - LOG_LEVEL=${FLARESOLVERR_LOG_LEVEL:-info}
+      - TZ=${TZ:-America/Vancouver}
+    networks:
+      - internal
+
+networks:
+  proxy:
+    external: true
+  internal:
+    driver: bridge