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

README.md

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+# Pezkuwi SubQuery
+
+SubQuery indexer for Pezkuwi blockchain - provides staking rewards, NominationPools, transfers and era validator data for PezWallet.
+
+## Projects
+
+- **pezkuwi.yaml** - Pezkuwi Relay Chain staking indexer
+- **pezkuwi-assethub.yaml** - Pezkuwi Asset Hub NominationPools and transfers indexer
+
+## Features
+
+- Staking rewards (Reward/Rewarded events)
+- Nomination Pool rewards (PaidOut events)
+- Slashing events (Slash/Slashed, PoolSlashed, UnbondingPoolSlashed)
+- Native transfers (balances.Transfer)
+- Asset transfers (assets.Transferred) - Asset Hub only
+- Era validator information (StakersElected/StakingElection)
+- Full transaction history (signed extrinsics)
+
+## Get Started
+
+### Install dependencies
+
+```shell
+yarn install
+```
+
+### Build
+
+```shell
+yarn build
+```
+
+### Local Development
+
+```shell
+sh local-runner.sh pezkuwi.yaml
+```
+
+### Deploy to SubQuery Network
+
+```shell
+./node_modules/.bin/subql publish -f pezkuwi.yaml
+./node_modules/.bin/subql publish -f pezkuwi-assethub.yaml
+```
+
+## Endpoints
+
+- **Pezkuwi Relay**: wss://rpc.pezkuwichain.io
+- **Pezkuwi Asset Hub**: wss://asset-hub-rpc.pezkuwichain.io
+
+## License
+
+Apache 2.0 - Based on Nova SubQuery implementation