chore: more playground scenarios (#1985)

Author: lricoy

playground/csp-violations/README.md

@@ -43,13 +43,27 @@ http://localhost:8080
 
 The playground includes examples for different types of CSP violations:
 
+### Basic CSP Violations
+
 1. **Inline Script Violation** - Tests violations of inline scripts
 2. **External Script Violation** - Tests loading scripts from non-allowed domains
 3. **External Image Violation** - Tests loading images from non-allowed domains
 4. **External Style Violation** - Tests loading stylesheets from non-allowed domains
 5. **XHR Violation** - Tests making XHR requests to non-allowed domains
 6. **Eval Violation** - Tests scripts with `eval` present
 
+### Report-To Debug Cases
+
+These test cases are specifically designed to debug report-to directive issues and test the logging functionality added in [PR #32868](https://github.com/PostHog/posthog/pull/32868):
+
+1. **Debug Enabled** - Tests CSP reports with `debug=true` parameter for verbose logging
+2. **Invalid Content Type** - Tests CSP reports sent with incorrect content type to trigger error logging
+3. **Report-URI Only** - Tests pages using only `report-uri` directive (no `report-to`)
+4. **Report-To Only** - Tests pages using only `report-to` directive (no `report-uri`)
+5. **Both Report Directives** - Tests pages using both `report-uri` and `report-to` directives
+6. **Malformed Reporting Endpoints** - Tests malformed `Reporting-Endpoints` header to trigger error logging
+7. **Sampling Test** - Generates multiple violations rapidly with random query parameters and hashes to bypass URL-based sampling and test sampling behavior and logging
+
 Each example will automatically trigger a CSP violation when the page loads, which will be reported to your configured CSP endpoint.
 
 ## How it Works