v0.50.0

Changelog

• c5a3f78 Clarify sync project access guidance
• c7fdd88 feat: JSON output foundation — persistent --json flag + emit/error helpers (td-d0f2ac)
• 9101aa3 feat: add --json to close; preserve review-family JSON shape (td-6f9e0b)
• c0f967f feat: add --json to create/add returning full issue (td-0a8c33)
• 81d43a0 feat: add --json to unstart/defer/block/reopen/unblock/link/note mutations (td-862b42)
• edab30e feat: add --json to update/start/log/handoff (td-7b9ddf)
• 3733676 feat: add HasAnyScope helper (td-250d27)
• 6ece85d feat: add first-class unique project slugs (td-2df74a)
• e5f4125 feat: add project invitation backend (td-274e59)
• 363b4ce feat: allow invited users through web signup (td-ff9d4d)
• 98bb614 feat: allow web signup magic links (td-7b6135)
• 2fb5781 feat: enforce sync scope on project routes, preserving admin proxy (td-f0bf76)
• cbae912 fix: close invitation backend edge cases (td-274e59)
• 8d7e570 fix: give device-login poll endpoints a separate, higher rate limit
• 82137db fix: skip soft-deleted in slug backfill, expose slug on admin API (td-2df74a)
• 327f21a refactor: collapse local --json onto persistent flag; add approve/review JSON; fix JSONError escaping (td-575c78)