fix(ci): retry corrupt parser downloads

.gitea/workflows/ci-deploy.yml

@@ -73,12 +73,18 @@ jobs:
           # The Debian runner omits pip and python3-venv. Use pip's official
           # zipapp and install into the checkout so CI remains isolated without
           # sudo or a mutable runner-global Python environment.
-          rm -rf .python-ci
           curl -fsSLo /tmp/pip.pyz https://bootstrap.pypa.io/pip/pip.pyz
-          python3 /tmp/pip.pyz install --target .python-ci --require-hashes \
+          install_parser_dependencies() {
-            --extra-index-url https://download.pytorch.org/whl/cpu \
+            rm -rf .python-ci
-            -r requirements-linux.lock
+            parser_pip_cache="$(mktemp -d)"
-          python3 /tmp/pip.pyz install --target .python-ci pytest==8.3.5 httpx2==2.12.0
+            PIP_CACHE_DIR="$parser_pip_cache" python3 /tmp/pip.pyz install --target .python-ci --require-hashes \
+              --extra-index-url https://download.pytorch.org/whl/cpu \
+              -r requirements-linux.lock
+          }
+          install_parser_dependencies \
+            || ( echo "Parser dependency install failed ($?) — retrying with a fresh isolated cache..." \
+                 && install_parser_dependencies )
+          PIP_CACHE_DIR="$parser_pip_cache" python3 /tmp/pip.pyz install --upgrade --target .python-ci pytest==8.3.5 httpx2==2.12.0
           PYTHONPATH="$PWD/.python-ci" AI_SERVICE_SKIP_MODEL_LOAD=1 python3 -m pytest -q
 
       - name: Restore backend