Initial commit: Pezkuwi SubQuery indexer

- pezkuwi.yaml: Relay chain staking indexer (rewards, slashes, pools, transfers, era info)
- pezkuwi-assethub.yaml: Asset Hub indexer (NominationPools, asset transfers)
- GraphQL schema for staking data entities
- Handler mappings from Nova SubQuery base

docker-compose.yml

@@ -0,0 +1,55 @@
+version: "3"
+services:
+  postgres:
+    container_name: "postgres-${PROJECT_PATH}"
+    image: postgres:16-alpine
+    ports:
+      - 5432:5432
+    volumes:
+      - .data/postgres:/var/lib/postgresql/data
+      - ./docker/init:/docker-entrypoint-initdb.d/
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    environment:
+      POSTGRES_PASSWORD: postgres
+
+  subquery-node:
+    container_name: "node-${PROJECT_PATH}"
+    image: onfinality/subql-node:v5.6.0
+    depends_on:
+      postgres:
+        condition: service_healthy
+    restart: always
+    environment:
+      DB_USER: postgres
+      DB_PASS: postgres
+      DB_DATABASE: postgres
+      DB_HOST: postgres
+      DB_POST: 5432
+    volumes:
+      - ./:/app
+    command:
+      - -f=/app/${PROJECT_PATH}
+      - --disable-historical=true
+      - --batch-size=1
+
+  graphql-engine:
+    container_name: "query-${PROJECT_PATH}"
+    image: onfinality/subql-query:v1.5.0
+    ports:
+      - 3000:3000
+    depends_on:
+      - subquery-node
+    restart: always
+    environment:
+      DB_USER: postgres
+      DB_PASS: postgres
+      DB_DATABASE: postgres
+      DB_HOST: postgres
+      DB_PORT: 5432
+    command:
+      - --name=app
+      - --playground