CDS extractor support paths-ignore CodeQL config

Read `paths-ignore` patterns from `.github/codeql/codeql-config.{yml,yaml}`
and apply them at two levels:

- CDS file discovery: filter out ignored files and skip entire projects
  whose directory matches a pattern (avoids unnecessary compilation)
- JS extraction handoff: append `exclude:` entries to LGTM_INDEX_FILTERS
  so compiled .cds.json output is also excluded

Uses js-yaml for config parsing and minimatch for glob matching, consistent
with CodeQL's documented paths-ignore semantics (**, *, directory prefixes).

Results are cached per source root to avoid repeated YAML reads.

Author: data-douser

extractors/cds/tools/dist/cds-extractor.bundle.js

@@ -26,6 +26,8 @@
     "child_process": "^1.0.2",
     "fs": "^0.0.1-security",
     "glob": "^13.0.6",
+    "js-yaml": "^4.1.1",
+    "minimatch": "^10.2.4",
     "os": "^0.1.2",
     "path": "^0.12.7",
     "tmp": "^0.2.5"
@@ -36,6 +38,8 @@
     "@eslint/js": "^9.39.2",
     "@types/glob": "^9.0.0",
     "@types/jest": "^30.0.0",
+    "@types/js-yaml": "^4.0.9",
+    "@types/minimatch": "^5.1.2",
     "@types/mock-fs": "^4.13.4",
     "@types/node": "^25.2.3",
     "@types/tmp": "^0.2.6",

extractors/cds/tools/dist/cds-extractor.bundle.js.map

@@ -6,6 +6,7 @@ import { sync } from 'glob';
 import { CdsFilesToCompile, CdsImport, PackageJson } from './types';
 import { modelCdsJsonFile } from '../../constants';
 import { cdsExtractorLog } from '../../logging';
+import { filterIgnoredPaths, getPathsIgnorePatterns } from '../../paths-ignore';
 
 /**
  * Determines the list of CDS files to be parsed for the specified project directory.
@@ -49,7 +50,23 @@ export function determineCdsFilesForProjectDir(
     });
 
     // Convert absolute paths to paths relative to sourceRootDir
-    return cdsFiles.map(file => relative(sourceRootDir, file));
+    const relativePaths = cdsFiles.map(file => relative(sourceRootDir, file));
+
+    // Apply paths-ignore filtering from CodeQL config
+    const pathsIgnorePatterns = getPathsIgnorePatterns(sourceRootDir);
+    if (pathsIgnorePatterns.length > 0) {
+      const filtered = filterIgnoredPaths(relativePaths, pathsIgnorePatterns);
+      const ignoredCount = relativePaths.length - filtered.length;
+      if (ignoredCount > 0) {
+        cdsExtractorLog(
+          'info',
+          `Filtered ${ignoredCount} CDS file(s) matching paths-ignore patterns in project ${relative(sourceRootDir, projectDir) || '.'}`,
+        );
+      }
+      return filtered;
+    }
+
+    return relativePaths;
   } catch (error: unknown) {
     cdsExtractorLog('error', `Error finding CDS files in ${projectDir}: ${String(error)}`);
     return [];