fix(woodpecker): handle shallow git clone for change detection

.woodpecker.yml

@@ -11,7 +11,17 @@ steps:
         #!/bin/bash
         set -e
 
-        CHANGED_FILES=$(git diff --name-only HEAD~1 HEAD || echo "")
+        # Fetch previous commit for comparison
+        git fetch --depth=2 origin +refs/heads/${CI_COMMIT_BRANCH}:refs/remotes/origin/${CI_COMMIT_BRANCH} || true
+
+        # Get changed files (handle shallow clone)
+        CHANGED_FILES=$(git diff --name-only HEAD~1 HEAD 2>/dev/null || git diff --name-only origin/${CI_COMMIT_BRANCH}~1 origin/${CI_COMMIT_BRANCH} 2>/dev/null || echo "ALL")
+
+        # If we can't detect changes, assume we should build
+        if [ "$CHANGED_FILES" = "ALL" ] || [ -z "$CHANGED_FILES" ]; then
+          echo "⚠️ Cannot detect changes, assuming build needed"
+          exit 0
+        fi
 
         # Skip if only docs changed
         if echo "$CHANGED_FILES" | grep -qE "^\.github/|^\.woodpecker|\.md$"; then
@@ -38,7 +48,6 @@ steps:
   - name: build-and-push
     image: woodpeckerci/plugin-docker-buildx:5.0.0
     settings:
-      # Use internal registry
       registry: docker-registry.registry.svc.cluster.local:5000
       repo: docker-registry.registry.svc.cluster.local:5000/nxtgauge-admin-solid
       dockerfile: Dockerfile
@@ -46,7 +55,6 @@ steps:
         - ${CI_COMMIT_SHA}
         - latest
         - high-performance-latest
-      # Use Docker Hub for base images
       logins:
         - registry: https://index.docker.io/v1/
           username:
@@ -54,6 +62,5 @@ steps:
           password:
             from_secret: DOCKERHUB_TOKEN
       platforms: linux/amd64
-      # Enable caching from/to internal registry
       cache_from: docker-registry.registry.svc.cluster.local:5000/nxtgauge-admin-solid:cache
       cache_to: docker-registry.registry.svc.cluster.local:5000/nxtgauge-admin-solid:cache