feat: add slug-only dashboard profile filter and unify backend imports

backend/tests/services/clean_release/test_candidate_manifest_services.py

@@ -9,10 +9,10 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 from src.core.database import Base
 from src.models.clean_release import ReleaseCandidate, DistributionManifest, CandidateArtifact
-from backend.src.services.clean_release.enums import CandidateStatus
-from backend.src.services.clean_release.candidate_service import register_candidate
-from backend.src.services.clean_release.manifest_service import build_manifest_snapshot
-from backend.src.services.clean_release.repository import CleanReleaseRepository
+from src.services.clean_release.enums import CandidateStatus
+from src.services.clean_release.candidate_service import register_candidate
+from src.services.clean_release.manifest_service import build_manifest_snapshot
+from src.services.clean_release.repository import CleanReleaseRepository
 
 @pytest.fixture
 def db_session():
@@ -43,7 +43,7 @@ def test_candidate_lifecycle_transitions(db_session):
     assert candidate.status == CandidateStatus.PREPARED
 
     # Invalid transition: PREPARED -> DRAFT (should raise IllegalTransitionError)
-    from backend.src.services.clean_release.exceptions import IllegalTransitionError
+    from src.services.clean_release.exceptions import IllegalTransitionError
     with pytest.raises(IllegalTransitionError, match="Forbidden transition"):
         candidate.transition_to(CandidateStatus.DRAFT)
 
@@ -200,4 +200,4 @@ def test_manifest_service_rejects_missing_candidate():
     with pytest.raises(ValueError, match="not found"):
         build_manifest_snapshot(repository=repository, candidate_id="missing-candidate", created_by="operator")
 
-# [/DEF:test_candidate_manifest_services:Module]
+# [/DEF:test_candidate_manifest_services:Module]