A community based topic aggregation platform built on atproto

test: update integration tests for .community. handle format master

Update all integration tests to use singular .community. naming convention instead of .communities. Tests updated: - E2E community creation and XRPC endpoint tests - HostedBy security validation tests - Community provisioning tests - Service integration tests - V2 validation tests - Token refresh tests Changes: - Update expected handle formats in assertions - Update test fixtures to use new convention - Ensure regex patterns match .community. format All tests passing with new handle format. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>