feat(api): add delete speaker functionality and corresponding tests

- Implemented a DELETE endpoint for removing speakers, including necessary authorization checks and response handling.
- Added a handler for the delete operation in the HTTP API.
- Created unit tests to verify the delete functionality, ensuring proper deletion and response codes.
- Updated OpenAPI documentation to reflect the new delete speaker endpoint.

internal/httpapi/speakers_test.go

@@ -41,6 +41,27 @@ func TestPostSpeaker_defaultsFromEndpointIP(t *testing.T) {
 	}
 }
 
+func TestDeleteSpeaker(t *testing.T) {
+	srv, err := New(Options{InsecureDev: true, SeedDemo: true, BundleSeedHex: testBundleSeed})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer srv.Close()
+	tenant, _, _, _, demoSpk := srv.Store().DemoIDs()
+	mustSetTestAPIKeys(t, srv, "edkey|"+tenant+"|editor")
+
+	req := httptest.NewRequest(http.MethodDelete, "/v1/speakers/"+demoSpk, nil)
+	req.Header.Set("Authorization", "Bearer edkey")
+	rec := httptest.NewRecorder()
+	srv.Handler().ServeHTTP(rec, req)
+	if rec.Code != http.StatusNoContent {
+		t.Fatalf("status %d body %s", rec.Code, rec.Body.String())
+	}
+	if _, err := srv.Store().GetSpeaker(tenant, demoSpk); err == nil {
+		t.Fatal("speaker should be deleted")
+	}
+}
+
 func TestGetBundleSigningPublicKey(t *testing.T) {
 	srv, err := New(Options{InsecureDev: true, SeedDemo: true, BundleSeedHex: testBundleSeed})
 	if err != nil {