Fix httpx.Timeout configuration in PyPI proxy

backend/app/models.py

@@ -71,7 +71,6 @@ class Package(Base):
     )
 
     project = relationship("Project", back_populates="packages")
-    tags = relationship("Tag", back_populates="package", cascade="all, delete-orphan")
     uploads = relationship(
         "Upload", back_populates="package", cascade="all, delete-orphan"
     )
@@ -120,7 +119,6 @@ class Artifact(Base):
     ref_count = Column(Integer, default=1)
     s3_key = Column(String(1024), nullable=False)
 
-    tags = relationship("Tag", back_populates="artifact")
     uploads = relationship("Upload", back_populates="artifact")
     versions = relationship("PackageVersion", back_populates="artifact")
     dependencies = relationship(
@@ -151,65 +149,6 @@ class Artifact(Base):
     )
 
 
-class Tag(Base):
-    __tablename__ = "tags"
-
-    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    package_id = Column(
-        UUID(as_uuid=True),
-        ForeignKey("packages.id", ondelete="CASCADE"),
-        nullable=False,
-    )
-    name = Column(String(255), nullable=False)
-    artifact_id = Column(String(64), ForeignKey("artifacts.id"), nullable=False)
-    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
-    updated_at = Column(
-        DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow
-    )
-    created_by = Column(String(255), nullable=False)
-
-    package = relationship("Package", back_populates="tags")
-    artifact = relationship("Artifact", back_populates="tags")
-    history = relationship(
-        "TagHistory", back_populates="tag", cascade="all, delete-orphan"
-    )
-
-    __table_args__ = (
-        Index("idx_tags_package_id", "package_id"),
-        Index("idx_tags_artifact_id", "artifact_id"),
-        Index(
-            "idx_tags_package_name", "package_id", "name", unique=True
-        ),  # Composite unique index
-        Index(
-            "idx_tags_package_created_at", "package_id", "created_at"
-        ),  # For recent tags queries
-    )
-
-
-class TagHistory(Base):
-    __tablename__ = "tag_history"
-
-    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    tag_id = Column(
-        UUID(as_uuid=True), ForeignKey("tags.id", ondelete="CASCADE"), nullable=False
-    )
-    old_artifact_id = Column(String(64), ForeignKey("artifacts.id"))
-    new_artifact_id = Column(String(64), ForeignKey("artifacts.id"), nullable=False)
-    change_type = Column(String(20), nullable=False, default="update")
-    changed_at = Column(DateTime(timezone=True), default=datetime.utcnow)
-    changed_by = Column(String(255), nullable=False)
-
-    tag = relationship("Tag", back_populates="history")
-
-    __table_args__ = (
-        Index("idx_tag_history_tag_id", "tag_id"),
-        Index("idx_tag_history_changed_at", "changed_at"),
-        CheckConstraint(
-            "change_type IN ('create', 'update', 'delete')", name="check_change_type"
-        ),
-    )
-
-
 class PackageVersion(Base):
     """Immutable version record for a package-artifact relationship.
 
@@ -249,7 +188,7 @@ class Upload(Base):
     artifact_id = Column(String(64), ForeignKey("artifacts.id"), nullable=False)
     package_id = Column(UUID(as_uuid=True), ForeignKey("packages.id"), nullable=False)
     original_name = Column(String(1024))
-    tag_name = Column(String(255))  # Tag assigned during upload
+    version = Column(String(255))  # Version assigned during upload
     user_agent = Column(String(512))  # Client identification
     duration_ms = Column(Integer)  # Upload timing in milliseconds
     deduplicated = Column(Boolean, default=False)  # Whether artifact was deduplicated
@@ -524,8 +463,8 @@ class PackageHistory(Base):
 class ArtifactDependency(Base):
     """Dependency declared by an artifact on another package.
 
-    Each artifact can declare dependencies on other packages, specifying either
-    an exact version or a tag. This enables recursive dependency resolution.
+    Each artifact can declare dependencies on other packages, specifying a version.
+    This enables recursive dependency resolution.
     """
 
     __tablename__ = "artifact_dependencies"
@@ -538,20 +477,13 @@ class ArtifactDependency(Base):
     )
     dependency_project = Column(String(255), nullable=False)
     dependency_package = Column(String(255), nullable=False)
-    version_constraint = Column(String(255), nullable=True)
-    tag_constraint = Column(String(255), nullable=True)
+    version_constraint = Column(String(255), nullable=False)
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
 
     # Relationship to the artifact that declares this dependency
     artifact = relationship("Artifact", back_populates="dependencies")
 
     __table_args__ = (
-        # Exactly one of version_constraint or tag_constraint must be set
-        CheckConstraint(
-            "(version_constraint IS NOT NULL AND tag_constraint IS NULL) OR "
-            "(version_constraint IS NULL AND tag_constraint IS NOT NULL)",
-            name="check_constraint_type",
-        ),
         # Each artifact can only depend on a specific project/package once
         Index(
             "idx_artifact_dependencies_artifact_id",