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## Summary by CodeRabbit
* **New Features**
* Provision local-emulator projects from a local config file and return
emulator credentials via a new internal endpoint.
* Dashboard: "Open config file" flow to open local projects and refresh
owned projects.
* **Changes**
* Branch config can prefer/read/write local files for emulator projects.
* Environment config updates/resets are blocked for local-emulator
projects.
* Dashboard UI shows read-only notices and disables project creation in
emulator mode.
* Added DB mapping and a standard env flag to identify local-emulator
projects.
* **Tests**
* New E2E tests covering provisioning and config restrictions.
* **Chores**
* Removed legacy emulator docs and compose; added CI workflow for
local-emulator E2E runs.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Konstantin Wohlwend <n2d4xc@gmail.com>