Addresses findings from the security audit:
- H1: add check_project_role to the legacy misc.py create endpoints
(milestones=mgr, tasks/supports/meetings=dev) that previously required
only authentication — closing a cross-project write bypass available to
any logged-in user or agent API key.
- M2: comments are always attributed to the authenticated caller; the
client-supplied author_id is dropped (no author spoofing).
- M3: API keys are stored as SHA-256 hashes (key_hash) plus a short
key_prefix for display — never plaintext. Lookup hashes the presented
key; listings never expose the secret. Includes an idempotent migration
for existing deployments.
- M5: the OIDC session cookie's Secure flag is env-driven via
SESSION_COOKIE_SECURE (default True; set false for plain-HTTP dev).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>