Fix graphql-subscriptions v3 compatibility in WebSocket replication

[Copilot]

• Identify the issue with graphql-subscriptions v3 upgrade
• Update graphql-server.ts to use asyncIterableIterator instead of asyncIterator
• Add null safety checks in GraphQL WebSocket subscription handler
• Handle different response structures in graphql-ws subscription messages
• Address code review feedback and simplify null checking logic
• Fix CI: Update Capacitor build to sync only Android on Linux
• Update GraphQL replication documentation with v3 breaking change warning
• Update GraphQL example server to use asyncIterableIterator
• Run and pass all tests
• Pass TypeScript type checking
• Pass linting

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[pubkey]

@copilot Fix the ci
Also ensure to update the docs accordingly

[Copilot]

@copilot Fix the ci
Also ensure to update the docs accordingly

Fixed the CI and updated documentation:

CI Fix: Changed Angular Capacitor build to sync only Android instead of both platforms. The iOS sync was failing because CocoaPods is not available on Linux CI runners.

Documentation Updates:

1. Added warning in GraphQL replication docs about asyncIterator() → asyncIterableIterator() breaking change
2. Updated GraphQL example server to use new API
3. Included code examples showing the migration path

All tests passing. Commit: c0c900f