v3.50.0

Release v3.50.0 — Standalone orchestrator for mapper and dev-cli.

• Multi-Issue Planning & Squads: accept file paths, stdin -, and inline JSON (#1803).
• Topological dependency resolution: parse Blocked by / Depends on / Contracts, compute waves, DAG validation (#1804).
• Agent loop triage and governance decision matrix: mandatory preview before execution (#1810).
• Self-Update: detect PEP 668 externally managed Python environments (#1802).
• Install: deduplicate owned paths, reset stale/resynced counters, --prune-project-copies (#1808).
• Doctor: bare 'simplicio-loop doctor' runs overview by default (#1809).
• Dashboard: state/token preservation across lifecycle (#1805), LISTEN/127.0.0.1 port resolution & --port auto (#1806), --allow-host & Tailscale .ts.net routing (#1807).
• Agent Governance: comprehensive update to AGENTS.md and agent skills.