Migration: backfill last_streak in users to be nullable False

Author: JoshD94

migrations/versions/46ba03c28573_make_last_streak_non_null_default_0.py

@@ -0,0 +1,33 @@
+"""make last_streak non_null default 0
+
+Revision ID: 46ba03c28573
+Revises: b09a4d8151d6
+Create Date: 2026-03-06 01:47:07.348774
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '46ba03c28573'
+down_revision = 'b09a4d8151d6'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.execute("UPDATE users SET last_streak = 0 WHERE last_streak IS NULL")
+    op.alter_column('users', 'last_streak',
+        existing_type=sa.INTEGER(),
+        nullable=False,
+        server_default=sa.text('0')
+    )
+
+
+def downgrade():
+    op.alter_column('users', 'last_streak',
+        existing_type=sa.INTEGER(),
+        nullable=True,
+        server_default=None
+    )