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>

app/services/llm_csv_parser.py

@@ -424,8 +424,10 @@ async def parse_with_llm(raw: bytes, session: AsyncSession) -> ParsedPie:
         first_seen_at=now,
         last_used_at=now,
         use_count=1,
-        llm_model=llm_log.model,
-        llm_cost_usd=llm_log.cost_usd,
+        model=llm_log.model,
+        prompt_tokens=llm_log.prompt_tokens,
+        completion_tokens=llm_log.completion_tokens,
+        cost_usd=llm_log.cost_usd,
     ))
     await session.commit()
     return pie