[Internal] Add an index for user email (#3409)

Author: peterschmidt85

src/dstack/_internal/server/migrations/versions/1aa9638ad963_added_email_index.py

@@ -0,0 +1,31 @@
+"""Added email index
+
+Revision ID: 1aa9638ad963
+Revises: 22d74df9897e
+Create Date: 2025-12-21 22:08:27.331645
+
+"""
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "1aa9638ad963"
+down_revision = "22d74df9897e"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("users", schema=None) as batch_op:
+        batch_op.create_index(batch_op.f("ix_users_email"), ["email"], unique=False)
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("users", schema=None) as batch_op:
+        batch_op.drop_index(batch_op.f("ix_users_email"))
+
+    # ### end Alembic commands ###

src/dstack/_internal/server/models.py

@@ -201,7 +201,7 @@ class UserModel(BaseModel):
     ssh_private_key: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
     ssh_public_key: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
 
-    email: Mapped[Optional[str]] = mapped_column(String(200), nullable=True)
+    email: Mapped[Optional[str]] = mapped_column(String(200), nullable=True, index=True)
 
     projects_quota: Mapped[int] = mapped_column(
         Integer, default=settings.USER_PROJECT_DEFAULT_QUOTA