移除发证单位并修正证书字体字重

backend/alembic/versions/20260813_0008_remove_issuer_fields.py

@@ -0,0 +1,31 @@
+"""remove unused issuer fields
+
+Revision ID: 20260813_0008
+Revises: 20260813_0007
+Create Date: 2026-08-13
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "20260813_0008"
+down_revision = "20260813_0007"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.drop_column("certificates", "issuer_name")
+    op.drop_column("project_courses", "default_issuer_name")
+
+
+def downgrade() -> None:
+    op.add_column(
+        "project_courses",
+        sa.Column("default_issuer_name", sa.String(length=128), nullable=False, server_default=""),
+    )
+    op.add_column(
+        "certificates",
+        sa.Column("issuer_name", sa.String(length=128), nullable=False, server_default=""),
+    )