fix(ci): push to the ashwin/ registry namespace, not the nonexistent nxtgauge org

Second failure: pushing to ci.nxtgauge.com/nxtgauge/nxtgauge-ai-assistant
404'd because no "nxtgauge" org exists on this Forgejo instance. The image
this app actually runs (verified against the live k8s deployment) lives
under ci.nxtgauge.com/ashwin/nxtgauge-ai-assistant, and the real GitOps
target is apps/nxtgauge-ai-assistant/overlays/prod/release-patch.yaml in
ashwin/nxtgauge-gitops (which Flux's image-automation-controller also
tracks via its $imagepolicy marker), not base/deployment.yaml.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.forgejo/workflows/build.yaml

@@ -62,17 +62,17 @@ jobs:
           SHA: ${{ github.sha }}
         run: |
           set -euo pipefail
-          image_ref="$REGISTRY_HOST/nxtgauge/nxtgauge-ai-assistant:$SHA"
+          image_ref="$REGISTRY_HOST/ashwin/nxtgauge-ai-assistant:$SHA"
 
           docker buildx build --push \
             -t "$image_ref" \
-            -t "$REGISTRY_HOST/nxtgauge/nxtgauge-ai-assistant:latest" \
+            -t "$REGISTRY_HOST/ashwin/nxtgauge-ai-assistant:latest" \
             -f Dockerfile \
             .
 
       - name: Update GitOps
         env:
-          GITOPS_REPO: https://ci.nxtgauge.com/nxtgauge/nxtgauge-gitops.git
+          GITOPS_REPO: https://ci.nxtgauge.com/ashwin/nxtgauge-gitops.git
           GITOPS_TOKEN: ${{ secrets.GITOPS_TOKEN }}
           SHA: ${{ github.sha }}
         run: |
@@ -85,10 +85,13 @@ jobs:
           git clone "$GITOPS_REPO" "$GITOPS_DIR"
           cd "$GITOPS_DIR"
 
-          # Update deployment image
-          sed -i "s|image: ci.nxtgauge.com/nxtgauge/nxtgauge-ai-assistant:.*|image: ci.nxtgauge.com/nxtgauge/nxtgauge-ai-assistant:$SHA|" apps/nxtgauge-ai-assistant/base/deployment.yaml
+          # release-patch.yaml carries a Flux $imagepolicy marker comment on
+          # this line - Flux's own image-automation-controller would
+          # eventually rewrite it too, but committing here makes the new
+          # tag live immediately instead of waiting on Flux's poll interval.
+          sed -i -E "s|(image: ci\.nxtgauge\.com/ashwin/nxtgauge-ai-assistant:)[a-f0-9]+|\1$SHA|" apps/nxtgauge-ai-assistant/overlays/prod/release-patch.yaml
 
           git config user.name "forgejo-actions[bot]"
           git config user.email "forgejo-actions@ci.nxtgauge.com"
-          git add apps/nxtgauge-ai-assistant/base/deployment.yaml
+          git add apps/nxtgauge-ai-assistant/overlays/prod/release-patch.yaml
           git diff --quiet || (git commit -m "chore(gitops): deploy ai-assistant@${SHA}" && git push)