Fix failing PR state test and add missing package tests

[iterate-evolve]

Summary

Fix failing PR state test and add missing package tests

Changes

• Self-improvement and bug fixes

Tasks

• Fix TestSaveAndLoadPRState failure
• Add tests for internal/retry package
• Add tests for internal/suggest package

[iterate-evolve]

Self-Review

Let me examine the actual state of the files mentioned in the session plan to verify the changes were made correctly.```tool
{"tool":"read_file","args":{"path":"internal/evolution/engine.go"}}

---
**Verdict:** ❌ Issues found — merge blocked.

*Reviewed by iterate-evolve[bot]*

[iterate-evolve]

Self-Review

Let me examine the actual state of the files mentioned in the session plan to verify the changes were properly implemented.```tool
{"tool":"read_file","args":{"path":"internal/evolution/engine.go"}}

---
**Auto-fix:** Could not resolve all issues automatically.

---
**Verdict:** ❌ Issues found — merge blocked.

*Reviewed by iterate-evolve[bot]*

[Patel230]

Test evolution with streaming fixes completed successfully!

✅ VERIFIED: All streaming output fixes working

• Review comments now show actual content (not empty)
• Auto-retry working (2 attempts)
• Evolution properly captures streaming API responses

The implementation didn't complete the actual code changes, but the framework is now working correctly.