fix: repair 5 MCP analysis tools with SQL errors + seed entity_status rows

- get_event_timeline: event_type/actor/message → type/source/data::text
- get_blast_radius: add JOIN entities for slug column
- get_state_snapshot: remove nonexistent disk_usage_pct, drift_count
- get_change_history: timestamp/actor_label/details → ts/actor_id::text/detail
- seed: upsert entity_status rows during inventory ingest (was empty, causing INNER JOIN on get_health_summary to return nothing)

plans/index.md

@@ -10,6 +10,7 @@ went sideways, open an investigation.
 | ---- | ----- | ------ |
 | 2026-07-05 | [Oikos Prometheus LXC](2026-07-05-oikos-prometheus-lxc.md) | Planned |
 | 2026-07-08 | [Plan vs implementation cross-reference](2026-07-08-plan-implementation-audit.md) | Planned |
+| 2026-07-08 | [Fix MCP analysis tools](2026-07-08-fix-mcp-analysis-tools.md) | Done |
 
 ## Done