fix(security): replace regex with loop to prevent ReDoS

CodeQL flagged `/\/+$/` as polynomial-time on repeated slashes.
Use `while (endsWith("/"))` loop instead.

packages/definitions/src/integration-url-template.ts

@@ -12,7 +12,8 @@ export const buildIntegrationUrl = (
   mode: UrlTemplateMode,
   dockerPort?: number,
 ): string => {
-  const host = baseHost.trim().replace(/\/+$/, "");
+  let host = baseHost.trim();
+  while (host.endsWith("/")) host = host.slice(0, -1);
   if (!host) return "";
 
   const slug = getSlugForKind(kind);

packages/definitions/src/integration.ts

@@ -474,7 +474,8 @@ export const getIntegrationDefaultPort = (kind: IntegrationKind): number | undef
 export const getIntegrationApiKeyUrl = (integrationUrl: string, kind: IntegrationKind): string | null => {
   const definition = integrationDefs[kind];
   if (!("apiKeySettingsPath" in definition)) return null;
-  const base = integrationUrl.replace(/\/+$/, "");
+  let base = integrationUrl;
+  while (base.endsWith("/")) base = base.slice(0, -1);
   if (!base) return null;
   return `${base}${definition.apiKeySettingsPath}`;
 };