ci: resolve the declared dependency floors on every PR

.github/workflows/_checks.yml

@@ -43,6 +43,36 @@ jobs:
         run: uv run --no-sync python -c "import sys, modern_di_faststream; assert not sys._is_gil_enabled(), 'GIL is enabled on a t-build'"
       - run: just test-ci
 
+  lowest:
+    # The declared floors are part of what we ship, and nothing else in CI installs
+    # them: `pytest` and `scheduled` both resolve highest. This leg resolves the lower
+    # bound instead, on every supported interpreter: a floor's wheel coverage is
+    # per-interpreter, so two interpreters resolving the same versions can still
+    # disagree on whether those versions install.
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+          - "3.14"
+    steps:
+      - uses: actions/checkout@v6
+      - uses: astral-sh/setup-uv@v8.2.0
+        with:
+          enable-cache: true
+          cache-dependency-glob: "**/pyproject.toml"
+      - run: uv python install ${{ matrix.python-version }}
+      - run: uv python pin ${{ matrix.python-version }}
+      # --no-build: a floor with no wheel for this interpreter must fail here rather
+      # than quietly compile its sdist. Without it the leg passes on a floor that
+      # still breaks anyone installing into an image with no build toolchain.
+      - run: uv sync --all-extras --no-install-project --resolution lowest-direct --no-build
+      - run: uv run --no-sync pytest .
+
   links:
     runs-on: ubuntu-latest
     steps:

pyproject.toml

@@ -30,18 +30,26 @@ Changelog = "https://github.com/modern-python/modern-di-faststream/releases"
 
 [dependency-groups]
 dev = [
-    "faststream[nats]",
-    "pytest",
-    "pytest-cov",
-    "pytest-asyncio",
-    "httpx",
-    "asgi-lifespan",
+    # Floored so `uv sync --resolution lowest-direct` resolves a usable harness: an
+    # unbounded name there resolves to the project's first-ever release.
+    "faststream[nats]>=0.7,<0.8",
+    "pytest>=8",
+    "pytest-cov>=5",
+    "pytest-asyncio>=0.24",
+    "httpx>=0.27",
+    "asgi-lifespan>=2.1",
 ]
 lint = [
     "ty",
     "ruff",
     "eof-fixer",
-    "typing-extensions",
+    # Both floors are pydantic wheel coverage, reached through the one resolution uv
+    # runs over every group: floored lower, typing-extensions holds pydantic back to a
+    # build whose pydantic-core ships no wheel for the interpreter. pydantic needs
+    # 4.12.2 from 3.13, and 2.12 — the first release with a cp314 pydantic-core —
+    # needs 4.14.1.
+    "typing-extensions>=4.12.2; python_version < '3.14'",
+    "typing-extensions>=4.14.1; python_version >= '3.14'",
 ]
 
 [build-system]