Archive room: mobile shelving for the father and mother archive

Planned (October 2026, user): the archive in the office gets mobile
archive shelving, A-Z Solutions (Vienna) as the reference
(a-z-solutions.eu, checked October 2026: hand wheel or electric drive,
lockable, rails need early floor planning; no published prices).

facility-security.md, new section under Protecting the irreplaceable:
what it holds (fathers and mothers, ~1,200 to 2,400 parts a year; a
reference pressing per title only as a proposal), sizing estimates (about
0.2 kg per part, ~3 mm and ~75 kg per shelf metre; in the Payap office's
~4 x 5.75 m room two fixed runs, four double carriages and one aisle hold
~150 shelf metres, ~50,000 parts, 20+ years), what it asks of the
building (ground slab at full rating, ~11 kN/m2 under the block; rails in
the screed fixed before the floor finish; geared hand wheel; gas,
climate, leak sensor, access control; barcoded box addresses), open
points (quotes from A-Z and a Thai supplier, storage format from the
galvanics vendors, fathers in a second compartment or off site).

Mirrors: site-candidates.md (office ground floor), phase 1 RFQ (archive
keeps the full slab rating if the slab is zoned), digital-factory.md
(archive location as box and shelf position, sets per mother),
equipment-suppliers.md (section 8 entry), total-investment.md added scope
(to quote, not in the sum).

docs/site-candidates.md

@@ -224,7 +224,9 @@ and every equipment envelope is an estimate.
   - Ground floor, for staff and the studio: reception and lobby, a canteen
     for about 40 with its kitchen, changing rooms for women and men with
     four showers each, toilets, mastering and cutting with an inner
-    acoustic lining, the listening room and the archive. Staff change here
+    acoustic lining, the listening room and the archive (mobile shelving
+    on the ground slab, [facility security](facility-security.md#archive-room-mobile-shelving)).
+    Staff change here
     before crossing to the factory, whose staff entry keeps only PPE and a
     WC.
   - First floor: the offices (~150 m²), a meeting and training room (the