chore(backend): Configure environment and constants for pool indexing

[rafamiziara]

Overview

Set up backend configuration for pool creation event indexing across supported chains.

Tasks

• Add chain configs to constants/chains.ts (RPC URLs, PoolFactory addresses)
• Add Firestore collection names to constants/firestore.ts
• Set up environment variables for RPC URLs (POLYGON_AMOY_RPC_URL)
• Add contract addresses (POOL_FACTORY_ADDRESS_AMOY)
• Add start block numbers (START_BLOCK_AMOY)
• Configure EVENT_SYNC_INTERVAL_MINUTES=5

Acceptance Criteria

• All environment variables documented and configured
• Chain configs support Polygon Amoy and localhost
• Firestore collection names centralized
• Configuration follows existing patterns

Related Documentation

• See docs/POOL_CREATION_ARCHITECTURE.md Configuration section
• See docs/POOL_CREATION_TASKS.md Task 7, 20

Labels: comp: backend, type: chore

Milestone: Sprint 3: Pool Creation

Part of Epic: #35