SQLite Testing

=====##http_security_headers(): void##=====
Sets security-related HTTP headers.
*| Header | Purpose | Config Key |*
|| Content-Security-Policy | XSS/injection protection | ##csp## ||
|| Permissions-Policy | Control browser features |
##permissions_policy## ||
|| Referrer-Policy | Control referrer information |
##referrer_policy## ||
|| Strict-Transport-Security | Force HTTPS | Auto (TLS only) ||
|| X-Frame-Options | Clickjacking protection | Hardcoded:
##SAMEORIGIN## ||
|| X-Content-Type-Options | MIME sniffing prevention | Hardcoded:
##nosniff## ||
**CSP Configuration Options:**
  - ##0## - Disabled
  - ##1## - Default policy (from ##csp.conf##)
  - ##2## - Custom policy (from ##csp_custom.conf##)