Release v0.15.3

[v0.15.3] - 2026-05-12

Features ✨

• No changes.

Improvements ⚙️

• Release neutral terminal crawler proxy leases properly to avoid stale reservations on paths like binary responses, page-not-found titles, no-title exhaustion, and incomplete-content exhaustion.
• Rotate proxy providers immediately after reported failures while releasing neutral terminal responses without affecting proxy health.
• Reuse least-reserved healthy proxy leases under concurrency saturation.

Bug Fixes 🐛

• Fix proxy lease finalization to release leases on neutral terminal responses, preventing stale reservations and improving lease management.

Testing 🧪

• Add crawler response regression tests for neutral terminal proxy lease release scenarios.
• Add regression coverage for saturated proxy lease selection through the public HTTP proxy selector path.
• Add configfile regression for validation of multi-document YAML streams.

Docs 📚

• Update architecture documentation to clarify proxy lease release on neutral terminal crawler responses.
• Update README to reflect improvements in proxy lease selection and release behavior.