chore: rework references for repo rename deploy-felhom-compose -> felhom-controller

Repo renamed on Gitea (admin/deploy-felhom-compose -> admin/felhom-controller).
Updates clone URLs, clone dirs, the customer bootstrap URL, build.sh, BUILDING.md,
README.md, CLAUDE.md, CONTEXT.md and TASK.md to the new name. No functional change:
Go module path and Docker image path (both already 'felhom-controller') untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,12 @@
 ## Changelog
 
+### Repo rename — `deploy-felhom-compose` → `felhom-controller` (2026-06-08)
+
+#### Changed
+- **Gitea repo renamed** `admin/deploy-felhom-compose` → `admin/felhom-controller` (via API). Sibling rename: `admin/proxmox-controller` → `admin/felhom-agent` (docs repo, future agent code).
+- **Reference rework (no functional change)**: updated every reference to the old repo name across docs and scripts — clone URLs, clone dirs (`~/git/felhom-controller`), the customer bootstrap URL in `scripts/felhom-wipe.sh` / `scripts/README.md`, `controller/build.sh`, `controller/BUILDING.md`, `controller/README.md`, `CLAUDE.md`, `CONTEXT.md`, `TASK.md`. Local working-copy dirs and the build-server source clone (`192.168.0.180:~/git/`) renamed to match.
+- **Intentionally unchanged**: Go module path `gitea.dooplex.hu/admin/felhom-controller` (already matches new name), Docker image path `gitea.dooplex.hu/admin/felhom-controller` (registry is namespaced by owner, not repo), binary name `felhom-controller`. Historical CHANGELOG entries left as-is (they record what was true at the time).
+
 ### Refactor — extract app-data-backup primitives into `internal/appbackup` (no behaviour change) (2026-06-08)
 
 #### Changed