feat: generate custom coverage config to omit legacy and external compoents (#9221)

* feat: generate custom coverage config to omit legacy and external components

* lint

* fix components config

* also remove deactivated componenets

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

codecov.yml

@@ -66,6 +66,22 @@ flags:
       - src/frontend/
     carryforward: true  # Preserve coverage data across builds if missing
 
+# Define coverage components for granular reporting
+component_management:
+  default_rules:  # default rules that will be inherited by all components
+    statuses:
+      - type: project # in this case every component that doens't have a status defined will have a project type one
+        target: auto
+        branches:
+          - "!main"
+  individual_components:
+    - component_id: backend_components
+      name: "Backend Components"
+      paths:
+        - src/backend/base/langflow/components/**
+    # Note: Many components excluded by .coveragerc (bundled + legacy)
+    # This tracks coverage of remaining "core" components only
+
 # Files/directories to exclude from coverage calculations
 ignore:
   # Database migrations - infrastructure code, not business logic