Add include_broken_links parameter to OpenAPI specs for events and materials

Co-authored-by: fbacall <503373+fbacall@users.noreply.github.com>

Author: Copilot

public/api/definitions/tess.yml

@@ -190,6 +190,11 @@ paths:
           description: Include events that are disabled.
           schema:
             type: boolean
+        - name: include_broken_links
+          in: query
+          description: Include events that have broken links.
+          schema:
+            type: boolean
         - name: eligibility[]
           in: query
           description: Filter by who is eligible to attend the event.
@@ -429,6 +434,11 @@ paths:
           description: Include materials that are disabled.
           schema:
             type: boolean
+        - name: include_broken_links
+          in: query
+          description: Include materials that have broken links.
+          schema:
+            type: boolean
       responses:
         200:
           description: A collection of materials, and facets available to filter them.