Search the Credential Engine Registry for credentials using the CTDL Search API with keyword and filter parameters

Steps

1. Review the Search API Handbook at https://credreg.net/registry/searchapi to understand the query structure
2. POST to https://credentialengine.org/assistapi/search with a JSON body containing query (keyword string), filters array (e.g., [{"URI": "ceterms:credentialType", "ItemsText": ["ceterms:Badge"]}]), and pagination fields skip and take
3. Parse the response envelope: results array contains credential summary objects each with ctid, name, subjectWebpage, and description fields
4. Filter by audience using ceterms:audienceType and by competency framework using ceasn:educationLevelType to narrow occupation-aligned credentials
5. Retrieve the full CTDL graph for a specific credential by calling GET https://credentialfinderapi.credentialengine.org/api/credential/{CTID}
6. Handle pagination using totalResults from the response to determine total pages (take defaults to 20; max is 100)