i18n: localize indicator summaries (per-group + aggregate read)

alembic/versions/0024_ind_summary_translations.py

@@ -0,0 +1,38 @@
+"""indicator_summary_translations table.
+
+Revision ID: 0024
+Revises: 0023
+Create Date: 2026-05-27
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+
+revision: str = "0024"
+down_revision: Union[str, None] = "0023"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "indicator_summary_translations",
+        sa.Column("id", sa.BigInteger(), primary_key=True, autoincrement=True),
+        sa.Column("summary_id", sa.BigInteger(), nullable=False),
+        sa.Column("lang", sa.String(length=8), nullable=False),
+        sa.Column("content_md", sa.Text(), nullable=False),
+        sa.Column("generated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("llm_model", sa.String(length=64), nullable=True),
+        sa.Column("llm_cost_usd", sa.Float(), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["summary_id"], ["indicator_summaries.id"],
+            ondelete="CASCADE", name="fk_ist_summary",
+        ),
+        sa.UniqueConstraint("summary_id", "lang", name="uq_ist_summary_lang"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("indicator_summary_translations")