Fix tests for tag removal and version behavior

- Fix upload response to return actual version (not requested version)
  when artifact already has a version in the package
- Update ref_count tests to use multiple packages (one version per
  artifact per package design constraint)
- Remove allow_public_internet references from upstream caching tests
- Update consistency check test to not assert global system health
- Add versions field to artifact schemas
- Fix dependencies resolution to handle removed tag constraint

backend/app/schemas.py

@@ -210,10 +210,10 @@ class ArtifactProvenanceResponse(BaseModel):
     # Usage statistics
     upload_count: int
     # References
-    packages: List[Dict[str, Any]]  # List of {project_name, package_name, tag_names}
-    tags: List[
+    packages: List[Dict[str, Any]]  # List of {project_name, package_name, versions}
+    versions: List[
         Dict[str, Any]
-    ]  # List of {project_name, package_name, tag_name, created_at}
+    ]  # List of {project_name, package_name, version, created_at}
     # Upload history
     uploads: List[Dict[str, Any]]  # List of upload events
 
@@ -236,6 +236,7 @@ class ArtifactDetailResponse(BaseModel):
     created_by: str
     ref_count: int
     format_metadata: Optional[Dict[str, Any]] = None
+    versions: List[Dict[str, Any]] = []  # List of {version, package_name, project_name}
 
     class Config:
         from_attributes = True
@@ -566,6 +567,7 @@ class ProjectStatsResponse(BaseModel):
     project_id: str
     project_name: str
     package_count: int
+    version_count: int
     artifact_count: int
     total_size_bytes: int
     upload_count: int
@@ -580,6 +582,7 @@ class PackageStatsResponse(BaseModel):
     package_id: str
     package_name: str
     project_name: str
+    version_count: int
     artifact_count: int
     total_size_bytes: int
     upload_count: int
@@ -598,6 +601,7 @@ class ArtifactStatsResponse(BaseModel):
     storage_savings: int  # (ref_count - 1) * size
     projects: List[str]  # Projects using this artifact
     packages: List[str]  # Packages using this artifact
+    versions: List[Dict[str, Any]] = []  # List of {version, package_name, project_name}
     first_uploaded: Optional[datetime] = None
     last_referenced: Optional[datetime] = None