chore(release): v1.4.39

Mood, medication-compliance, and cumulative-sum rollup tiers extend
the v1.4.38 fast-path posture to two more endpoints that still walked
the source table on every cold mount.

Raw measurements / mood_entries / medication_intake_events tables are
byte-unchanged. Three new tiers are derived caches that self-heal via
boot-time backfill on first reach.

Expected wins:
- /api/mood/analytics 12.7 s -> ~200 ms
- /api/medications/intake?scope=compliance 3.2 s -> ~200 ms
- /api/dashboard/summary ~500 ms -> ~300 ms
- /api/analytics live-fallback 347 k rows -> ~5 k rows (425 d cap)

Tests 4 524 -> 4 640 (+116). Typecheck clean. Lint clean.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "healthlog",
-  "version": "1.4.38.8",
+  "version": "1.4.39",
   "description": "Self-hosted personal-health-tracking PWA with Withings integration, AI insights, and doctor-report PDF export.",
   "license": "AGPL-3.0-only",
   "homepage": "https://healthlog.dev",