fix: handle blockTags for get-all-events

[arcoraven]

PR-Codex overview

This PR focuses on enhancing the schema validation for blockchain event queries and improving error handling in the event retrieval process.

Detailed summary

• Added blockNumberOrTagSchema for validating block number or tag inputs.
• Updated fromBlock and toBlock in eventsQuerystringSchema to use the new schema.
• Improved error handling in getAllEvents function with custom error messages.
• Refactored fromBlock and toBlock to handle types more robustly.

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