fix: configure codecov token and coverage paths

- Add CODECOV_TOKEN to codecov-action uploads (required for v4)
- Change unit test coverage from single file to entire package
- Add codecov.yml with coverage thresholds and flags

Note: CODECOV_TOKEN secret must be added to repository settings.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/test.yml

@@ -86,7 +86,7 @@ jobs:
       run: |
         # Run only unit tests (fragmentation and prioritization)
         python -m pytest tests/test_fragmentation.py tests/test_prioritization.py -v \
-          --cov=src/ble_reticulum/BLEFragmentation.py \
+          --cov=src/ble_reticulum \
           --cov-report=term-missing \
           --cov-report=xml:coverage-unit.xml
       continue-on-error: false
@@ -95,6 +95,7 @@ jobs:
       if: matrix.python-version == '3.11'
       uses: codecov/codecov-action@v4
       with:
+        token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage-unit.xml
         flags: unit
         fail_ci_if_error: false
@@ -151,6 +152,7 @@ jobs:
       if: matrix.python-version == '3.11'
       uses: codecov/codecov-action@v4
       with:
+        token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage-integration.xml
         flags: integration
         fail_ci_if_error: false

codecov.yml

@@ -0,0 +1,33 @@
+coverage:
+  precision: 2
+  round: down
+  range: "60...100"
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 5%
+    patch:
+      default:
+        target: 80%
+        threshold: 5%
+
+comment:
+  layout: "reach,diff,flags,files"
+  behavior: default
+  require_changes: true
+
+flags:
+  unit:
+    paths:
+      - src/ble_reticulum/
+    carryforward: true
+  integration:
+    paths:
+      - src/ble_reticulum/
+    carryforward: true
+
+ignore:
+  - "tests/**/*"
+  - "**/__pycache__/**"
+  - "**/conftest.py"