fix: configure coverage to report correct metrics

Added coverage configuration to pyproject.toml to properly track
source files in src/ layout. Updated CI workflow to use coverage
settings from pyproject.toml instead of inline parameters.

This fixes the issue where Codecov was showing 0% coverage despite
having 85% actual test coverage.

Author: libraz

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
 
     - name: Run tests
       run: |
-        pytest tests/ -v --cov=bpm_detector --cov-report=xml
+        pytest tests/ -v --cov --cov-report=xml
 
     - name: Upload coverage reports to Codecov
       uses: codecov/codecov-action@v5

pyproject.toml

@@ -119,6 +119,24 @@ force_grid_wrap = 0
 use_parentheses = true
 ensure_newline_before_comments = true
 
+[tool.coverage.run]
+source = ["src"]
+omit = [
+    "*/tests/*",
+    "*/test_*",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "raise AssertionError",
+    "raise NotImplementedError",
+    "if __name__ == .__main__.:",
+    "if TYPE_CHECKING:",
+    "if typing.TYPE_CHECKING:",
+]
+
 [tool.mypy]
 python_version = "3.8"
 warn_return_any = false