chore: import upstream snapshot with attribution

.github/workflows/ci.yml

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+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: CI
+
+on:
+  pull_request:
+    branches: ["main"]
+  push:
+    branches: ["main"]
+
+# Least privilege: these jobs only read the repo; no write scopes are needed.
+permissions:
+  contents: read
+
+# Cancel superseded runs when new commits are pushed to the same ref.
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint-and-test:
+    name: Lint & Test (Python ${{ matrix.python-version }})
+    runs-on: ubuntu-latest
+    # Windows is excluded: the test suite has known path-separator failures
+    # in build_context that are out of scope for this workflow.
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.12", "3.13", "3.14"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up uv
+        # Pinned to a full commit SHA (third-party action); comment tracks the tag.
+        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5
+        with:
+          enable-cache: true
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: uv sync --all-extras
+
+      - name: Lint with ruff
+        run: uv run ruff check src/ tests/
+
+      - name: Check formatting with ruff
+        run: uv run ruff format --check src/ tests/
+
+      - name: Run unit tests with coverage
+        run: uv run pytest -m "not integration" --cov=src/skillspector --cov-report=term-missing
+
+  dco:
+    name: DCO Check
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Verify DCO sign-off on all commits
+        run: |
+          BASE=${{ github.event.pull_request.base.sha }}
+          HEAD=${{ github.event.pull_request.head.sha }}
+          # Iterate SHAs directly rather than piping `git log` into `while read`:
+          # `git log` does not print a trailing newline after the final record,
+          # so a read-loop silently skips the last commit — and for a one-commit
+          # PR (the common case) the body never runs at all, letting an unsigned
+          # commit pass. A for-loop over the SHA list checks every commit.
+          status=0
+          for sha in $(git log --format=%H "${BASE}..${HEAD}"); do
+            if ! git log -1 --format="%B" "$sha" | grep -q "^Signed-off-by:"; then
+              echo "  missing Signed-off-by: $sha $(git log -1 --format=%s "$sha")"
+              status=1
+            fi
+          done
+          if [ "$status" -ne 0 ]; then
+            echo ""
+            echo "Please add a DCO sign-off (git commit -s) to all commits."
+            exit 1
+          fi
+          echo "All commits have DCO sign-off."

.github/workflows/scorecard.yml

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+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '40 17 * * 2'
+  push:
+    branches: [ "main" ]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    # `publish_results: true` only works when run from the default branch. conditional can be removed if disabled.
+    if: github.event.repository.default_branch == github.ref_name || github.event_name == 'pull_request'
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+      # Uncomment the permissions below if installing in a private repository.
+      # contents: read
+      # actions: read
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@f49aabe0b5af0936a0987cfb85d86b75731b0186 # v2.4.1
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # - you want to enable the Branch-Protection check on a *public* repository, or
+          # - you are installing Scorecard on a *private* repository
+          # To create the PAT, follow the steps in https://github.com/ossf/scorecard-action?tab=readme-ov-file#authentication-with-fine-grained-pat-optional.
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # Public repositories:
+          #   - Publish results to OpenSSF REST API for easy access by consumers
+          #   - Allows the repository to include the Scorecard badge.
+          #   - See https://github.com/ossf/scorecard-action#publishing-results.
+          # For private repositories:
+          #   - `publish_results` will always be set to `false`, regardless
+          #     of the value entered here.
+          publish_results: true
+
+          # (Optional) Uncomment file_mode if you have a .gitattributes with files marked export-ignore
+          # file_mode: git
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard (optional).
+      # Commenting out will disable upload of results to your repo's Code Scanning dashboard
+      # - name: "Upload to code-scanning"
+      #  uses: github/codeql-action/upload-sarif@v3
+      #  with:
+      #    sarif_file: results.sarif