v1.1.0 - Password protection & multi-domain support

What's Changed

• ci(process): add development integration branch and PR gate workflow by @nicknow in #1
• chore(release): sync main with development by @nicknow in #2

Full Changelog: v1.0.0...v1.1.0

Password protection & multi-domain support

Added

• Per-page password protection (S23): admins can set or clear one password per page on create
  or edit (min 5 chars, max 256; empty = not protected). Visitors see a server-rendered
  password prompt; a successful unlock sets an opaque-token HttpOnly cookie (pl_unlock).
  Protected pages bypass the CDN — all entry HTML, image bytes, and assets are served by the
  Worker with Cache-Control: no-store and a Worker-origin <base> href. See ADR 0041 for
  the locked design decisions, OQ-19..OQ-24 for the open-questions log, and §10 of the roadmap
  for the full slice table.

Fixed

• setup.mjs now detects and rejects deployments that would silently corrupt an existing
  deployment when run with the same projectName but different workerDomain/cdnDomain. A
  multi-domain collision guard (checkDomainCollisions) queries the real Cloudflare API to
  find existing Worker and R2 custom-domain associations before creating or modifying any
  resource, and aborts with an actionable error message when a collision is detected. An
  explicit opt-in override (SETUP_ALLOW_REPOINT) is available for deliberate repointing.
  See ADR 0044 for the detection heuristic and rationale.
• setup.mjs now rewrites the top-level name field in wrangler.toml so that the Worker
  script targets the correct name when deploying to multiple domains from the same checkout.
  A new deriveWorkerName() helper mirrors the existing derive*Name helpers.

Changed

• CI process: switched to a feature → development → main branching workflow. Feature
  branches PR into development (the integration branch), and main only moves when a
  human deliberately promotes development into it for release. A CI workflow runs the
  full local gate (typecheck, lint, format:check, test) on PRs into development/main
  and pushes to development.