Refactor code for improved readability and consistency

[agnesnaomiolim-cloud]

Closes #682

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Closes #683

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• Updated import statements to maintain consistent formatting across files.
• Enhanced readability by adding commas and adjusting line breaks in object literals and function parameters.
• Simplified template rendering functions for better clarity.
• Improved variable extraction and replacement logic in template utilities.
• Refactored event filtering and aggregation functions for better maintainability.
• Added utility function for parsing event IDs from URL parameters.
• Updated mock data generation functions for webhook deliveries and activity events.
• Cleaned up test files to ensure consistent formatting and improved readability.

Overview

Related Issue

Closes #

Changes

Verification

# e.g.
cd dashboard && npm test
cd listener && npm run typecheck && npm test
cd contract/contracts/hello-world && cargo test

How to Test

Checklist

• Branch is up to date with main
• Tests added/updated and all pass locally
• cargo fmt --all run (if Rust changes)
• npm run lint passes (if TypeScript changes)
• Documentation updated if behavior changed

#close issues683

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