ci: push images to artifactapi registry instead of gitea

Hard switch of the docker push target from the Gitea registry to the
artifactapi local docker registry (docker-internal); the Gitea VM and its
registry are being retired. Drops the droneci/DRONECI_PASSWORD creds since
artifactapi accepts unauthenticated in-cluster pushes. Also repoints the agentpool sample image (covers forgebot-api + forgebot-operator).

Claude-Session: https://claude.ai/code/session_015ur3i7D2azsMAWTSVABApv

.woodpecker/build.yaml

@@ -5,13 +5,13 @@ steps:
   - name: docker-build-api
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      repo: git.unkin.net/unkin/forgebot-api
+      repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/forgebot-api
       dockerfile: Dockerfile.api
       dry_run: true
 
   - name: docker-build-operator
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      repo: git.unkin.net/unkin/forgebot-operator
+      repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/forgebot-operator
       dockerfile: Dockerfile.operator
       dry_run: true

.woodpecker/docker.yaml

@@ -6,12 +6,9 @@ steps:
   - name: docker-api
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      registry: git.unkin.net
+      registry: artifactapi.k8s.syd1.au.unkin.net
-      repo: git.unkin.net/unkin/forgebot-api
+      repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/forgebot-api
       dockerfile: Dockerfile.api
-      username: droneci
-      password:
-        from_secret: DRONECI_PASSWORD
       tags:
         - ${CI_COMMIT_TAG}
         - latest
@@ -19,12 +16,9 @@ steps:
   - name: docker-operator
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      registry: git.unkin.net
+      registry: artifactapi.k8s.syd1.au.unkin.net
-      repo: git.unkin.net/unkin/forgebot-operator
+      repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/forgebot-operator
       dockerfile: Dockerfile.operator
-      username: droneci
-      password:
-        from_secret: DRONECI_PASSWORD
       tags:
         - ${CI_COMMIT_TAG}
         - latest

config/samples/agentpool.yaml

@@ -8,7 +8,7 @@ spec:
   model: claude-sonnet-4-20250514
   endpoint: https://litellm.k8s.syd1.au.unkin.net
   maxConcurrent: 3
-  image: git.unkin.net/unkin/agent-dev:latest
+  image: artifactapi.k8s.syd1.au.unkin.net/docker-internal/agent-dev:latest
   resources:
     requests:
       cpu: 500m