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>

controller/build.sh

@@ -16,7 +16,7 @@
 set -euo pipefail
 
 # --- Configuration (edit these if your paths differ) ---
-REPO_DIR="/home/kisfenyo/git/deploy-felhom-compose"
+REPO_DIR="/home/kisfenyo/git/felhom-controller"
 CONTROLLER_SRC="${REPO_DIR}/controller"
 WEBSITE_ASSETS_DIR="/home/kisfenyo/git/felhom.eu/website/assets"
 REGISTRY="gitea.dooplex.hu/admin"
@@ -40,7 +40,7 @@ step()  { echo -e "${CYAN}[STEP]${NC}  $*"; }
 # --- Pre-flight checks ---
 if [[ ! -d "${CONTROLLER_SRC}" ]]; then
     error "Controller source not found: ${CONTROLLER_SRC}"
-    error "Clone the repo first: git clone https://gitea.dooplex.hu/admin/deploy-felhom-compose.git ${REPO_DIR}"
+    error "Clone the repo first: git clone https://gitea.dooplex.hu/admin/felhom-controller.git ${REPO_DIR}"
     exit 1
 fi