fix(logging): improve operator diagnostics

[GatewayJ]

Type of Change

• New Feature
• Bug Fix
• Documentation
• Performance Improvement
• Test/CI
• Refactor
• Other: Observability

Related Issues

N/A

Summary of Changes

Improve operator diagnostics by converting important log sites to structured fields and adding missing logs around reconcile failures, StatefulSet lifecycle actions, provisioning transitions, pool decommission operations, STS authorization failures, and Console server/API failures.

This also stabilizes the Console static frontend fallback test by giving concurrent test runs unique temporary directories.

Checklist

• I have read and followed the CONTRIBUTING.md guidelines
• Passed make pre-commit (fmt-check + clippy + test + console-lint + console-fmt-check)
• Added/updated necessary tests
• Documentation updated (if needed)
• CHANGELOG.md updated under [Unreleased] (if user-visible change)
• CI/CD passed (if applicable)

Impact

• Breaking change (CRD/API compatibility)
• Requires doc/config/deployment update
• Other impact: Improves runtime observability without changing public APIs or CRD behavior.

Verification

make pre-commit

Additional Notes

N/A