Update documentation and scripts for revision tracking and cloud-init enhancements</message>

<message>Introduce a revision tracking system across project files, allowing for easier identification of changes. Update the README files to include instructions for bumping revisions and auto-bumping on commits. Additionally, enhance cloud-init scripts with revision comments for better version control. Modify the dashboard API to improve build status management, including a forced clear option for stuck statuses, enhancing user experience and operational reliability.

README.md

@@ -1,7 +1,18 @@
+<!-- Revision: 2 -->
 # reTerminal DM4
 
 Project for **reTerminal DM4** (Seeed) with CM4: Chromium kiosk, eMMC provisioning (USB + network boot), and first-boot configuration via cloud-init.
 
+## Revisions
+
+A single **revision number** is kept in `REVISION` and in a comment line in tracked files (`# Revision: N` or `<!-- Revision: N -->`) so you can see what changed across hosts and deploys.
+
+- **Bump revision (update all files):** from repo root run  
+  `./emmc-provisioning/scripts/bump-revision.sh`
+- **Auto-bump on every commit:** install the pre-commit hook  
+  `cp emmc-provisioning/scripts/pre-commit-revision.sh .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit`  
+  Then every commit will bump the revision and update the revision line in all tracked files.
+
 ## Repository structure
 
 | Path | Purpose |