Add a Zagros Asset Hub history indexer for the explorer host

The explorer at explorer.pezkuwichain.io needs transfer history for Zagros
Asset Hub. It runs on the explorer host next to its own archive node, so the
manifest points at 127.0.0.1:9955 and the compose file binds everything
locally with memory limits and no published ports.

deploy-vps now ignores these files: a change to the Zagros indexer must not
rebuild or restart the mainnet stack and its bots on the indexer host.

docker-compose.zagros.yml

@@ -0,0 +1,82 @@
+# Zagros Asset Hub history for explorer.pezkuwichain.io.
+#
+# Runs on the explorer host next to its own archive node (systemd unit
+# zagros-ah-archive, RPC on 127.0.0.1:9955), never on the mainnet indexer host:
+# deploy-vps ignores this file and zagros-assethub.yaml.
+#
+# Everything uses the host network. Postgres binds 127.0.0.1; subql-node (3101)
+# and subql-query (3100) cannot be told to, so the host firewall (default deny,
+# only 22/80/443 open) keeps them local. Docker would bypass that firewall for
+# published ports, so nothing is published.
+# nginx exposes only POST /history/assethub (same origin as the explorer).
+#
+#   printf 'ZAGROS_DB_PASS=%s\n' "$(openssl rand -hex 24)" > .env.zagros && chmod 600 .env.zagros
+#   docker compose -f docker-compose.zagros.yml --env-file .env.zagros up -d
+#
+# The mapping in dist/ must be built first (see ops/zagros/README.md).
+name: zagros-history
+
+services:
+  postgres:
+    image: postgres:16-alpine
+    network_mode: host
+    command: ["postgres", "-c", "listen_addresses=127.0.0.1", "-c", "port=5433"]
+    volumes:
+      - zagros-pgdata:/var/lib/postgresql/data
+      - ./docker/init:/docker-entrypoint-initdb.d
+    environment:
+      POSTGRES_PASSWORD: ${ZAGROS_DB_PASS:?set ZAGROS_DB_PASS in .env.zagros}
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres -h 127.0.0.1 -p 5433"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+    mem_limit: 1g
+    restart: unless-stopped
+
+  subquery-node-assethub:
+    build:
+      context: .
+      dockerfile: docker/Dockerfile.node
+    network_mode: host
+    depends_on:
+      postgres: { condition: service_healthy }
+    environment:
+      TZ: UTC
+      DB_USER: postgres
+      DB_PASS: ${ZAGROS_DB_PASS:?set ZAGROS_DB_PASS in .env.zagros}
+      DB_DATABASE: postgres
+      DB_HOST: 127.0.0.1
+      DB_PORT: 5433
+    volumes:
+      - ./:/app/project:ro
+    command:
+      - -f=/app/project/zagros-assethub.yaml
+      - --db-schema=subquery-zagros-assethub
+      - --disable-historical=true
+      - --batch-size=30
+      - --port=3101
+    mem_limit: 1g
+    restart: unless-stopped
+
+  graphql-engine-assethub:
+    image: onfinality/subql-query:v1.5.0
+    network_mode: host
+    depends_on:
+      - subquery-node-assethub
+    environment:
+      DB_USER: postgres
+      DB_PASS: ${ZAGROS_DB_PASS:?set ZAGROS_DB_PASS in .env.zagros}
+      DB_DATABASE: postgres
+      DB_HOST: 127.0.0.1
+      DB_PORT: 5433
+    command:
+      - --name=subquery-zagros-assethub
+      - --indexer=http://127.0.0.1:3101
+      - --port=3100
+      - --query-limit=100
+    mem_limit: 512m
+    restart: unless-stopped
+
+volumes:
+  zagros-pgdata: