v0.3.0

Highlights

• Add built-in LOOP skill for feedback-driven improvement and maintenance loops.
• Add built-in pievo-feedback skill for sanitized upstream issue drafts.
• Load built-in skills for background runs while keeping Pievo tool extension disabled there.
• Route background schedule results through the front agent and improve schedule/LOOP E2E coverage.
• Clean up brittle tests to assert behavior instead of prompt/file snapshots.