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/store/backend.go

@@ -73,6 +73,7 @@ type Backend interface {
 	GetSpeakerAnyTenant(speakerID string) (*Speaker, error)
 	CreateSpeaker(tenantID string, in *Speaker) (*Speaker, error)
 	UpdateSpeaker(tenantID, id string, patch *SpeakerPatch) (*Speaker, error)
+	DeleteSpeaker(tenantID, id string) error
 
 	GetRevision(tenantID, revisionID string) (*Revision, error)
 	ListRevisions(tenantID, moduleID string, cursor string, limit int) (items []*Revision, nextCursor string, hasMore bool)

internal/store/memory_crud.go

@@ -779,6 +779,18 @@ func (m *Memory) UpdateSpeaker(tenantID, id string, patch *SpeakerPatch) (*Speak
 	return sp, nil
 }
 
+func (m *Memory) DeleteSpeaker(tenantID, id string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	sp, ok := m.speakers[id]
+	if !ok || sp.TenantID != tenantID {
+		return ErrNotFound
+	}
+	delete(m.speakers, id)
+	delete(m.publishedRevision, id)
+	return nil
+}
+
 func (m *Memory) ListRevisionPrefixes(tenantID, revisionID string, cursor string, limit int) ([]PrefixRow, string, bool) {
 	if limit <= 0 {
 		limit = 50