chore: adapt CI workflows for Gitea and uwu.lc deployment

- Update all workflow runners from blacksmith to ubuntu-latest
- Configure release-server.yaml for Gitea container registry (git.i5.wtf)
- Change trigger branch from canary to uwu
- Add NOTES.md documenting branch setup and changes

NOTES.md

@@ -0,0 +1,68 @@
+# uwu.lc Self-Hosting Notes
+
+## Branch Setup
+
+**Current branch**: `uwu` (based on `refactor`)
+- **Tracks**: `origin/refactor` for rebasing upstream changes
+- **Pushes to**: `i5/uwu` on your Gitea instance at git.i5.wtf
+- **Current state**: 1 commit ahead (LFS config change)
+
+## Workflow
+
+### Pull upstream changes and rebase
+```bash
+git fetch origin
+git rebase origin/refactor
+```
+
+### Push your changes to Gitea
+```bash
+git push i5 uwu
+# If you've rebased, use: git push i5 uwu --force-with-lease
+```
+
+### View your changes
+```bash
+git log origin/refactor..uwu  # Show commits you've added
+```
+
+## Why track `refactor` branch?
+
+The `refactor` branch is a complete rewrite that:
+- Is simpler and lighter to self-host
+- Uses SQLite instead of complex database setup
+- Removes payment/Plutonium stuff for self-hosted deployments
+- Is much better documented
+- Is where active development happens
+
+The old `main`/`canary` branches have the legacy stack that's harder to self-host.
+
+## Configuration Changes Made
+
+1. **LFS Config** (`.lfsconfig`): Updated to point to Gitea instance
+   - Old: `https://github.com/fluxerapp-old/fluxer-private.git/info/lfs`
+   - New: `https://git.i5.wtf/fluxerapp/fluxer.git/info/lfs`
+
+2. **CI Workflows**: Updated for Gitea compatibility
+   - Changed all runners from `blacksmith-8vcpu-ubuntu-2404` to `ubuntu-latest`
+   - `ci.yaml`: Main CI workflow (typecheck, test, gateway, knip, ci-scripts)
+   - `release-server.yaml`: Docker build workflow
+     - Registry: `ghcr.io` → `git.i5.wtf`
+     - Image: `fluxerapp/fluxer-server`
+     - Trigger branch: `canary` → `uwu`
+     - Default source ref: `canary` → `uwu`
+
+## TODO
+
+- [ ] Modify GitHub Actions workflows for Gitea compatibility
+- [ ] Apply patches from third-party guide (if needed)
+- [ ] Configure for uwu.lc domain
+- [ ] Test CI on Gitea instance
+- [ ] Build Docker image
+- [ ] Deploy to production
+
+## Resources
+
+- Third-party guide: https://gist.github.com/PaulMColeman/e7ef82e05035b24300d2ea1954527f10
+- Domain: uwu.lc
+- Gitea: git.i5.wtf