chore: import upstream snapshot with attribution

.github/workflows/ci.yml

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+name: Unit tests
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [t4_gpu, ubuntu-latest, windows-latest]
+      fail-fast: false
+    env:
+      # T4 can't run bf16 in vllm; size for the 16GB card. (No-op on the
+      # CPU runners, which skip the VLM-backed tests.)
+      VLLM_DTYPE: float16
+      VLLM_GPU_TYPE: t4
+      SURYA_INFERENCE_STARTUP_TIMEOUT: "1200"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+        with:
+          version: latest
+          enable-cache: true
+      - name: Set up Python 3.11
+        run: uv python install 3.11
+      - name: Install dependencies
+        run: uv sync --frozen --group dev
+      - name: Run tests
+        run: uv run pytest

.github/workflows/cla.yml

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+name: "Surya CLA Assistant"
+on:
+  issue_comment:
+    types: [created]
+  pull_request_target:
+    types: [opened,closed,synchronize]
+
+# explicitly configure permissions, in case your GITHUB_TOKEN workflow permissions are set to read-only in repository settings
+permissions:
+  actions: write
+  contents: write
+  pull-requests: write
+  statuses: write
+
+jobs:
+  CLAAssistant:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Surya CLA Assistant"
+        if: (github.event.comment.body == 'recheck' || github.event.comment.body == 'I have read the CLA Document and I hereby sign the CLA') || github.event_name == 'pull_request_target'
+        uses: contributor-assistant/github-action@v2.3.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # the below token should have repo scope and must be manually added by you in the repository's secret
+          # This token is required only if you have configured to store the signatures in a remote repository/organization
+          PERSONAL_ACCESS_TOKEN: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
+        with:
+          path-to-signatures: 'signatures/version1/cla.json'
+          path-to-document: 'https://github.com/datalab-to/surya/blob/master/CLA.md'
+          # branch should not be protected
+          branch: 'master'
+          allowlist: VikParuchuri

.github/workflows/publish.yml

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+name: Python package
+on:
+  push:
+    tags:
+      - "v*.*.*"
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+        with:
+          version: latest
+          enable-cache: true
+      - name: Set up Python 3.11
+        run: uv python install 3.11
+      - name: Build package
+        run: uv build
+      - name: Publish package
+        env:
+          UV_PUBLISH_TOKEN: ${{ secrets.PYPI_TOKEN }}
+        run: uv publish

.github/workflows/scripts.yml

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+name: Test CLI scripts
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: t4_gpu
+    env:
+      # T4 (Turing, compute 7.5) can't run bf16 in vllm; size vllm for the 16GB
+      # card and give the cold start (image pull + model download) headroom.
+      VLLM_DTYPE: float16
+      VLLM_GPU_TYPE: t4
+      SURYA_INFERENCE_STARTUP_TIMEOUT: "1200"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+        with:
+          version: latest
+          enable-cache: true
+      - name: Set up Python 3.11
+        run: uv python install 3.11
+      - name: Install dependencies
+        run: uv sync --frozen --group dev
+      - name: Download benchmark data
+        run: |
+          wget -O benchmark_data.zip "https://drive.google.com/uc?export=download&id=1NHrdYatR1rtqs2gPVfdvO0BAvocH8CJi"
+          unzip -o benchmark_data.zip
+      - name: Test detection
+        run: uv run surya_detect benchmark_data/pdfs/switch_trans.pdf --page_range 0
+      # Spawn the vllm server once and reuse it across the OCR/layout/table
+      # steps (--keep_server) instead of paying a cold start three times.
+      - name: Test OCR
+        run: uv run surya_ocr benchmark_data/pdfs/switch_trans.pdf --page_range 0 --keep_server
+      - name: Test layout
+        run: uv run surya_layout benchmark_data/pdfs/switch_trans.pdf --page_range 0 --keep_server
+      - name: Test table
+        run: uv run surya_table benchmark_data/pdfs/switch_trans.pdf --page_range 0 --keep_server
+      - name: Test detection folder
+        run: uv run surya_detect benchmark_data/pdfs --page_range 0