feat: add timestamp driven callbacks to indexer

[ryardley]

References #1020

• Marks sections to refactor
• Add new ThresholdQueue for executing threshold callbacks. We can use this later with events in ciphernodes too.
• Add specialized version for Indexer called CallbackQueue
• Setup block listener functionality in EventListener
• Ensured that on failure listening retries
• Created dispatch_after_tijmestamp method on EnclaveIndexer
• Colocated public methods
• Hid non public exports
• Extracted delayed functionliaty to handle_e3_input_deadline_expiration function
• Needed to run TS tools with pnpm
• Contract documentation was inaccurate compared to how we are using the expires field so I updated the docs.

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ry/1020-blockchain-time-threshold-queue

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Project	Deployment	Preview	Comments	Updated (UTC)
crisp	Ready	Preview	Comment	Nov 22, 2025 2:32am
enclave-docs	Ready	Preview	Comment	Nov 22, 2025 2:32am

[ryardley]

putting this on hold until #1043 is merged

[ryardley]

closing this to re-implement over #1043