fix: split pipeline into 4 workflows for cross-node scheduling

Multi-workflow with local-path storage + mismatchLabelKeys anti-affinity
forces each workflow onto a different cluster node:
- test: lint + pytest + vitest (node A)
- build-1: scheduler, symbol-registry, ingestion, parser (node B)
- build-2: extractor, aggregation, recommendation, risk (node C)
- build-3: broker-adapter, lake-publisher, query-api, trading-engine, dashboard, superset (node D)
- finalize: integration-test + github mirror (any available node)

.woodpecker/finalize.yml

@@ -0,0 +1,48 @@
+# Workflow 5: Integration test and mirror
+depends_on:
+  - build-1
+  - build-2
+  - build-3
+
+when:
+  event: push
+  branch: main
+
+steps:
+  integration-test:
+    image: registry.celestium.life/dockerhub-cache/alpine/k8s:1.30.2
+    environment:
+      DOCKERHUB_USER:
+        from_secret: docker_username
+      DOCKERHUB_TOKEN:
+        from_secret: docker_password
+    commands:
+      - bash infra/inttest/run_pipeline.sh --image-tag ${CI_COMMIT_SHA} --results-file inttest-results.json
+    backend_options:
+      kubernetes:
+        resources:
+          requests:
+            memory: 256Mi
+            cpu: 200m
+          limits:
+            memory: 512Mi
+            cpu: 1000m
+
+  mirror-github:
+    image: registry.celestium.life/dockerhub-cache/alpine/git
+    failure: ignore
+    environment:
+      GITHUB_SSH_KEY:
+        from_secret: github_ssh_key
+    commands:
+      - "[ -z \"$GITHUB_SSH_KEY\" ] && echo 'No SSH key configured, skipping mirror' && exit 0"
+      - mkdir -p ~/.ssh
+      - echo "$GITHUB_SSH_KEY" > ~/.ssh/id_ed25519
+      - chmod 600 ~/.ssh/id_ed25519
+      - ssh-keyscan github.com >> ~/.ssh/known_hosts 2>/dev/null
+      - git remote add github git@github.com:celesrenata/stonks-oracle.git || git remote set-url github git@github.com:celesrenata/stonks-oracle.git
+      - git fetch --unshallow origin || true
+      - git push github main --force
+      - git push github --tags --force
+    depends_on:
+      - integration-test