fix: resolve all ESLint errors

- droidRelayService: add missing keyId variable declaration
- quotaCardService: use object destructuring for actualDeducted
- apiKeyService: remove unused variables and duplicate requires
- redis: remove shadowed logger/config requires
- unifiedGeminiScheduler: rename isActive param to avoid shadow
- commonHelper: add comments to empty catch blocks
- testPayloadHelper: prefix unused model param with underscore

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

src/utils/commonHelper.js

@@ -333,10 +333,14 @@ const getAppVersion = () => {
     if (fs.existsSync(versionFile)) {
       return fs.readFileSync(versionFile, 'utf8').trim()
     }
-  } catch {}
+  } catch {
+    // ignore
+  }
   try {
     return require('../../package.json').version
-  } catch {}
+  } catch {
+    // ignore
+  }
   return '1.0.0'
 }