ci: remove GitHub CI — native git.hanzo.ai + cd.hanzo.ai only

Inherited upstream workflow, repointed at a self-hosted ARC pool at fork time.
ARC is being decommissioned: CI runs inside git.hanzo.ai (Gitea Actions,
.hanzo/workflows) and delivery is cd.hanzo.ai reconciling the reviewed image
pin in hanzoai/universe. GitHub is a mirror and runs nothing.

This repo has no .hanzo/workflows today; it is a fork whose upstream CI we do
not rely on. If it needs a build, it gets a native pipeline — not an ARC pool.

.github/workflows/test-integration.yaml

@@ -1,111 +0,0 @@
-name: Test Integration
-
-on:
-  push:
-    branches:
-      - main
-    paths-ignore:
-      - 'docs/**'
-      - '**.md'
-      - 'script/gcg/**'
-  pull_request:
-    branches:
-      - '*'
-    paths-ignore:
-      - 'docs/**'
-      - '**.md'
-      - 'script/gcg/**'
-
-env:
-  CGO_ENABLED: 0
-
-jobs:
-
-  build:
-    runs-on: hanzo-build-linux-amd64
-    timeout-minutes: 20
-
-    steps:
-      - name: Check out code
-        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
-        with:
-          fetch-depth: 0
-
-      - name: Set up Go
-        uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
-        with:
-          go-version-file: '.go-version'
-          check-latest: true
-
-      - name: Avoid generating webui
-        run: |
-          touch webui/static/index.html
-
-      - name: Build binary
-        run: make binary-linux-amd64
-
-      - name: Save go cache build
-        uses: actions/cache/save@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
-        with:
-          path: |
-            ~/.cache/go-build
-          key: ${{ runner.os }}-go-build-cache-${{ hashFiles('**/go.mod', '**/go.sum') }}
-
-      - name: Artifact hanzo-ingress binary
-        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
-        with:
-          name: hanzo-ingress
-          path: ./dist/linux/amd64/hanzo-ingress
-          retention-days: 1
-
-  test-integration:
-    runs-on: hanzo-build-linux-amd64
-    timeout-minutes: 90
-    needs:
-      - build
-    strategy:
-      fail-fast: true
-      matrix:
-        parallel: [12]
-        index: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
-
-    steps:
-      - name: Check out code
-        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
-        with:
-          fetch-depth: 0
-
-      - name: Set up Go
-        uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
-        with:
-          go-version-file: '.go-version'
-          check-latest: true
-
-      - name: Download hanzo-ingress binary
-        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
-        with:
-          name: hanzo-ingress
-          path: ./dist/linux/amd64/
-
-      - name: Make binary executable
-        run: chmod +x ./dist/linux/amd64/hanzo-ingress
-
-      - name: Restore go cache build
-        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
-        with:
-          path: |
-            ~/.cache/go-build
-          key: ${{ runner.os }}-go-build-cache-${{ hashFiles('**/go.mod', '**/go.sum') }}
-
-      - name: Generate go test Slice
-        id: test_split
-        uses: hashicorp-forge/go-test-split-action@ddb2685fb140c29505663b405af7eb2cd953dd13 # v2.0.1
-        with:
-          packages: ./integration
-          total: ${{ matrix.parallel }}
-          index: ${{ matrix.index }}
-
-      - name: Run Integration tests
-        run: |
-          TESTS=$(echo "${{ steps.test_split.outputs.run}}" | sed 's/\$/\$\$/g')
-          TESTFLAGS="-run \"${TESTS}\"" make test-integration