Estimator: Immich peak 3,290 -> 3,983 MB from the 4,000-photo import (R-1147, operator yes 2026-10-18); Immich alone on 8 GB now 'does not fit'

Rebuilt sizing-data.json; data cache-bust v5; SIZING.md table and the pinned test cases moved
with it. Before/after: audits/day-2026-10-18/P6-before-after.md.

documentation/audits/sizing-2026-10-13/sizing.json

@@ -372,7 +372,7 @@
    "slug": "immich",
    "display_name": "Immich",
    "mem_typical_mb": 1557,
-   "mem_peak_mb": 3290,
+   "mem_peak_mb": 3983,
    "cpu_class": "heavy-in-bursts",
    "cpu_note": "only while it reads new photos: thumbnails, face and search indexing (200 photos took about 6 minutes)",
    "source": "onboarding",
@@ -389,6 +389,16 @@
      "was": 3061,
      "now": 3290
     }
+   ],
+   "raised_by_large_library": [
+    {
+     "field": "peak",
+     "was": 3290,
+     "now": 3983,
+     "date": "2026-10-18",
+     "why": "a 4,000-photo import on scratch guest 9202 (demo-hp): the four containers' memory.current summed, at its peak (heap alone 2,777 MB); the server was OOM-killed twice at its old 2 GB limit — felhom.eu documentation/audits/night-2026-10-18/P6/; operator yes 2026-10-18 12:16 and again for the before/after table",
+     "basis": "memory.current (includes file cache) — above `used`, so it leans to the safe side"
+    }
    ]
   },
   {