fix: [Geneva Exporter] Add retries for ingestion info retrieval

[lalitb]

towards: #309

Summary

This PR adds retry logic to the Geneva Config Service client to improve resilience against transient network issues and server overload. The changes implement intelligent error handling with appropriate backoff strategies.

Key changes:

• Adds retry mechanism with up to 3 attempts for Geneva Config Service API calls
• Implements smart backoff strategy using server-provided Retry-After headers or fixed delays
• Introduces new error type for rate limiting scenarios with retry information
• No changes in upload API, as retry for upload failure is the responsibility of caller.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 24 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.2%. Comparing base (95b097a) to head (49fbb6d).

Files with missing lines	Patch %	Lines
...eneva/geneva-uploader/src/config_service/client.rs	66.6%	24 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #442   +/-   ##
=====================================
  Coverage   53.2%   53.2%           
=====================================
  Files         70      70           
  Lines      10648   10718   +70     
=====================================
+ Hits        5665    5711   +46     
- Misses      4983    5007   +24     

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[utpilla]

fixes: #309

This PR doesn't fix that issue. It's only working on add retries for the ingestion info calls not the actual upload calls. We should either create a dedicate issue for this PR or use a different phrase such as "Towards" or "Partially Fixes" so that merging this PR doesn't automatically close the issue.

[utpilla]

We need to respect the Retry-After header if present, before sending the request again.

[lalitb]

Good point. I wasn't actually aware that such rate limiting option exists in HTTP, Added now.

[lalitb]

This PR doesn't fix that issue. It's only working on add retries for the ingestion info calls not the actual upload calls. We should either create a dedicate issue for this PR or use a different phrase such as "Towards" or "Partially Fixes" so that merging this PR doesn't automatically close the issue.

Agree, done.

[Copilot]

Pull Request Overview

This PR adds robust retry logic to the Geneva Config Service client to improve resilience against transient network issues and server overload. The changes implement intelligent error handling with appropriate backoff strategies.

Key changes:

• Adds retry mechanism with up to 3 attempts for Geneva Config Service API calls
• Implements smart backoff strategy using server-provided Retry-After headers or fixed delays
• Introduces new error type for rate limiting scenarios with retry information

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
client.rs	Implements retry logic, error handling, and backoff strategy for config service calls
Cargo.toml	Adds tokio dependency for sleep functionality in retry implementation

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