feat(tests): update Alpaca API tests to include range parameters and improve stock database cleanup

- Modified Alpaca Historical Bars tests to include range parameters in API requests.
- Updated test descriptions for clarity.
- Added cleanup step to delete test ticker after verification in stock database tests.
- Adjusted Vitest configuration to exclude test files from coverage.

playwright.config.ts

@@ -9,7 +9,7 @@ const config: PlaywrightTestConfig = {
   },
   use: {
     trace: "on-first-retry",
-    headless: false,
+    headless: !!process.env.CI,
     viewport: { width: 1280, height: 800 },
   },
   reporter: [["html", { output: "test-results" }]],