test: update conformance validation to include expanded set of valid catalog types

Author: mindpower

conformance/bin/conformance-test

@@ -138,7 +138,17 @@ class ConformanceTester:
             if not media_type:
                 self.add_error(f"[{label}] Missing required 'type' (mediaType).")
             else:
-                valid_types = ["application/mcp-server-card+json", "application/a2a-agent-card+json", "application/ai-catalog+json", "application/ai-registry+json"]
+                valid_types = [
+                    "application/ai-catalog+json",
+                    "application/agent-card+json",
+                    "application/a2a-agent-card+json",
+                    "application/mcp-server-card+json",
+                    "application/agent-skills+zip",
+                    "application/agent-skills+gzip",
+                    "text/markdown; profile=\"urn:air:agent-skills\"",
+                    "application/ai-registry",
+                    "application/ai-registry+json"
+                ]
                 if media_type not in valid_types:
                     self.add_warning(f"[{label}] Media type '{media_type}' is not one of standard discovery types: {valid_types}.")