feat(tests): on-hold button with reason modal, Jira comment + On Hold transition

backend/alembic/versions/b051_add_test_hold_fields.py

@@ -0,0 +1,25 @@
+"""Add is_on_hold, hold_reason, held_at to tests.
+
+Revision ID: b051
+Revises: b050
+Create Date: 2026-06-19
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = "b051"
+down_revision = "b050"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("tests", sa.Column("is_on_hold", sa.Boolean(), nullable=False, server_default="false"))
+    op.add_column("tests", sa.Column("hold_reason", sa.Text(), nullable=True))
+    op.add_column("tests", sa.Column("held_at", sa.DateTime(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("tests", "held_at")
+    op.drop_column("tests", "hold_reason")
+    op.drop_column("tests", "is_on_hold")