Add history_notebook tables migration.

Merge migration adding history_notebook and history_notebook_revision tables.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jmchilton

lib/galaxy/model/migrations/alembic/versions_gxy/b75f0f4dbcd4_add_history_notebook_tables.py

@@ -0,0 +1,80 @@
+"""add history_notebook tables
+
+Revision ID: b75f0f4dbcd4
+Revises: 1d1d7bf6ac02, 23143e0bf1d8
+Create Date: 2025-01-06
+
+"""
+
+import sqlalchemy as sa
+
+from galaxy.model.custom_types import TrimmedString
+from galaxy.model.migrations.util import (
+    create_foreign_key,
+    create_table,
+    drop_table,
+    transaction,
+)
+
+# revision identifiers, used by Alembic.
+revision = "b75f0f4dbcd4"
+down_revision = ("1d1d7bf6ac02", "23143e0bf1d8")
+branch_labels = None
+depends_on = None
+
+NOTEBOOK_TABLE = "history_notebook"
+REVISION_TABLE = "history_notebook_revision"
+
+
+def upgrade():
+    with transaction():
+        # Create notebook table first (without latest_revision_id FK)
+        create_table(
+            NOTEBOOK_TABLE,
+            sa.Column("id", sa.Integer, primary_key=True),
+            sa.Column("create_time", sa.DateTime),
+            sa.Column("update_time", sa.DateTime),
+            sa.Column(
+                "history_id",
+                sa.Integer,
+                sa.ForeignKey("history.id"),
+                nullable=False,
+                index=True,
+            ),  # No unique - multiple notebooks per history
+            sa.Column("title", sa.Text),
+            sa.Column("latest_revision_id", sa.Integer, index=True),
+            sa.Column("deleted", sa.Boolean, default=False, index=True),
+            sa.Column("purged", sa.Boolean, default=False, index=True),
+        )
+
+        # Create revision table with FK to notebook
+        create_table(
+            REVISION_TABLE,
+            sa.Column("id", sa.Integer, primary_key=True),
+            sa.Column("create_time", sa.DateTime),
+            sa.Column("update_time", sa.DateTime),
+            sa.Column(
+                "notebook_id",
+                sa.Integer,
+                sa.ForeignKey("history_notebook.id"),
+                index=True,
+            ),
+            sa.Column("content", sa.Text),
+            sa.Column("content_format", TrimmedString(32)),
+            sa.Column("edit_source", TrimmedString(16), default="user"),
+        )
+
+        # Add FK from notebook.latest_revision_id -> revision.id
+        create_foreign_key(
+            "history_notebook_latest_revision_id_fk",
+            NOTEBOOK_TABLE,
+            REVISION_TABLE,
+            ["latest_revision_id"],
+            ["id"],
+        )
+
+
+def downgrade():
+    with transaction():
+        drop_table(REVISION_TABLE)
+        drop_table(NOTEBOOK_TABLE)