sync: align runtime source with GitHub main

app/generation/models.py

@@ -95,9 +95,10 @@ class GenerationJob(Base):
         String(36), ForeignKey("workspaces.id", ondelete="RESTRICT"), nullable=False
     )
     provider: Mapped[str] = mapped_column(String(64), nullable=False)
+    # Snapshot the selected brand-kit version on the logical job so retries
+    # and result views retain the exact creative policy used at submission.
     brand_kit_version_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
     status: Mapped[str] = mapped_column(String(32), nullable=False, default="queued")
-    progress_percent: Mapped[int | None] = mapped_column(Integer, nullable=True)
     attempt_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
     max_attempts: Mapped[int] = mapped_column(Integer, nullable=False, default=3)
     next_attempt_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
@@ -141,7 +142,6 @@ class GenerationJobAttempt(Base):
     status: Mapped[str] = mapped_column(String(32), nullable=False)
     brand_kit_version_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
     external_job_id: Mapped[str | None] = mapped_column(String(128))
-    error_code: Mapped[str | None] = mapped_column(String(100))
     error_message: Mapped[str | None] = mapped_column(Text)
     provider_request_id: Mapped[str | None] = mapped_column(String(255))
     started_at: Mapped[datetime] = mapped_column(