fix(health): remove stale SEED_META for RPC-populated keys, bump to v2.6.5 (#1669)

riskScores and serviceStatuses have data but permanently stale seed-meta
(no longer written by cachedFetchJson after PR #1649). ON_DEMAND_KEYS
only affects EMPTY status, not STALE_SEED. Removing their SEED_META
entries so health doesn't check freshness for keys that can't update it.

Also bumps version to 2.6.5.

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "world-monitor"
-version = "2.6.1"
+version = "2.6.5"
 description = "World Monitor desktop application"
 authors = ["World Monitor"]
 edition = "2021"

src-tauri/tauri.conf.json

@@ -2,7 +2,7 @@
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "World Monitor",
   "mainBinaryName": "world-monitor",
-  "version": "2.6.1",
+  "version": "2.6.5",
   "identifier": "app.worldmonitor.desktop",
   "build": {
     "beforeDevCommand": "npm run build:sidecar-sebuf && node scripts/build-sidecar-handlers.mjs && npm run dev",