Codebase bug resolution

[charlesvien]

What type of PR is this?

Uncomment only one /kind <> line, press enter to put that in a new line, and remove leading whitespace from that line:

/kind bug

What this PR does / Why we need it:
This PR addresses several bug fixes:

• Unbounded HTTP body reads: Limits the size of request bodies read in the 404 handler and webhook responses to prevent potential DoS/memory exhaustion.
• Global HTTP client race condition: Ensures the correct CA bundle is applied for webhook calls by creating a new HTTP client/transport per request, avoiding global state mutation and race conditions.
• Corrects logrus.Fatal usage: Changes logrus.Fatal to logrus.Fatalf in an example for proper argument formatting.
• Improves multicluster weighted selection robustness: Adds checks for empty connections, mismatched lengths, and negative weights to prevent panics.
• Resolves duplicate main() issue: Adds build tags to a load test scenario to prevent conflicts during compilation.

Which issue(s) this PR fixes:

Closes #

Special notes for your reviewer:
The multicluster weighted selection logic was initially considered for a change to handle all-zero weights, but this was reverted as existing tests confirm "weight=0 means never choose" is an intentional invariant. The other fixes are independent.

---

 

[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
_{Learn more about Cursor Agents}