models: align translation column naming + add token counts

Three recently-added tables (strategic_log_translations,
indicator_summary_translations, csv_format_templates) drifted from
the codebase's existing naming convention:
- llm_model -> model
- llm_cost_usd -> cost_usd
- content_md -> content  (on the two translation tables; csv_format
  doesn't have a content field)

Also added prompt_tokens and completion_tokens to the three tables;
they were silently dropped at write time despite LogResult exposing
them.

All writer call sites (ai_log_job, indicator_summary_job,
llm_csv_parser) and reader call sites (api.py localized helpers)
updated to match. Tests realigned.

Migration 0025 uses batch_alter_table for SQLite compatibility.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/test_localization_integration.py

@@ -27,13 +27,13 @@ def test_strategic_log_translation_model_columns():
     cols = {c.name: c for c in inspect(StrategicLogTranslation).columns}
     assert "log_id" in cols
     assert "lang" in cols
-    assert "content_md" in cols
+    assert "content" in cols
     assert "generated_at" in cols
-    assert "llm_model" in cols
-    assert "llm_cost_usd" in cols
+    assert "model" in cols
+    assert "cost_usd" in cols
     assert cols["log_id"].nullable is False
     assert cols["lang"].nullable is False
-    assert cols["content_md"].nullable is False
+    assert cols["content"].nullable is False
 
 
 async def test_log_translation_fanout_no_active_non_en_users(db_factory, monkeypatch):
@@ -113,9 +113,9 @@ async def test_log_translation_fanout_italian_user(db_factory, monkeypatch):
     row = rows[0]
     assert row.log_id == log_id
     assert row.lang == "it"
-    assert row.content_md.startswith("# Apertura")
-    assert row.llm_model == "deepseek/deepseek-v4-flash"
-    assert row.llm_cost_usd == pytest.approx(0.00002)
+    assert row.content.startswith("# Apertura")
+    assert row.model == "deepseek/deepseek-v4-flash"
+    assert row.cost_usd == pytest.approx(0.00002)
 
 
 async def test_log_translation_fanout_per_language_failure_isolated(db_factory, monkeypatch):