feat(api): Introduce workflow pause state management (#27298)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/migrations/versions/2025_10_22_1611-03f8dcbc611e_add_workflowpause_model.py

@@ -0,0 +1,41 @@
+"""add WorkflowPause model
+
+Revision ID: 03f8dcbc611e
+Revises: ae662b25d9bc
+Create Date: 2025-10-22 16:11:31.805407
+
+"""
+
+from alembic import op
+import models as models
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "03f8dcbc611e"
+down_revision = "ae662b25d9bc"
+branch_labels = None
+depends_on = None
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "workflow_pauses",
+        sa.Column("workflow_id", models.types.StringUUID(), nullable=False),
+        sa.Column("workflow_run_id", models.types.StringUUID(), nullable=False),
+        sa.Column("resumed_at", sa.DateTime(), nullable=True),
+        sa.Column("state_object_key", sa.String(length=255), nullable=False),
+        sa.Column("id", models.types.StringUUID(), server_default=sa.text("uuidv7()"), nullable=False),
+        sa.Column("created_at", sa.DateTime(), server_default=sa.text("CURRENT_TIMESTAMP"), nullable=False),
+        sa.Column("updated_at", sa.DateTime(), server_default=sa.text("CURRENT_TIMESTAMP"), nullable=False),
+        sa.PrimaryKeyConstraint("id", name=op.f("workflow_pauses_pkey")),
+        sa.UniqueConstraint("workflow_run_id", name=op.f("workflow_pauses_workflow_run_id_key")),
+    )
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table("workflow_pauses")
+    # ### end Alembic commands ###