restore codecov config

.github/scripts/copy_sources.sh

@@ -207,6 +207,7 @@ cp $2/.gitignore $tmp_dir
 cp $2/.gitmodules $tmp_dir
 cp $2/CMakePresets.json $tmp_dir
 cp $2/CMakeLists.txt $tmp_dir
+cp $2/codecov.yml $tmp_dir
 cp $2/LICENSE $tmp_dir
 cp $2/README.md $tmp_dir
 for oss_test_dir in slo_workloads deb_package; do

codecov.yml

@@ -0,0 +1,25 @@
+coverage:
+  status:
+    project:
+      default:
+        target: auto       # do not drop below the current level...
+        threshold: 1%      # ...by more than 1%
+    patch:
+      default:
+        target: 80%        # new/changed code in the PR diff must be >= 80% covered
+
+# Cross-repo uniform metric: every YDB SDK repo defines this same component_id,
+# so native-SDK coverage is queryable identically via the Codecov API
+# (?component_id=native-sdk), regardless of how each repo tags its uploads.
+#
+# The SDK proper lives in src/ (implementation) and include/ (public headers).
+# The vendored Arcadia libraries (util/, library/, contrib/, third_party/) and
+# examples/tests/tools are not part of the native SDK and are pinned out by listing
+# only the SDK paths.
+component_management:
+  individual_components:
+    - component_id: native-sdk
+      name: Native SDK
+      paths:
+        - "src/**"
+        - "include/**"