Feat/17-retry mechanism

[gurkanguray]

Implement Exponential Retries

This PR implements exponential backoff retry mechanisms throughout the codebase using the cenkalti/backoff library, as suggested in #17.

Changes

• Added new internal/retry package with:

  • Generic retry functionality with exponential backoff
  • Type-safe retry operations via TypedRetrier
  • Configurable retry parameters

• Implemented retries in critical operations:

  • Database operations in persist package
  • Admin token operations
  • Secret operations
  • Initialization operations

Implementation Details

• Created standardized retry configurations with sensible defaults
• Added proper context handling and cancellation support
• Implemented comprehensive logging of retry attempts
• Maintained type safety through generic implementations

Testing

• Added unit tests for retry mechanisms
• Verified retry behavior in database operations
• Tested timeout and cancellation scenarios

Related Issues

Closes #17

[v0lkan]

I have two change requests:

• instead of logging use a callback function
• move the module under pkg

Other than that, it looks amazing 🤤 .

Thanks for your contributions 🎊 .

[v0lkan]

Instead of an explicit log, can we have a callback function (passed as an argument)? As in:

notify(err, duration, totalDuration)

That will make this module more generic.

[gurkanguray]

I added a notify option 🙌🏻