Add whole-factory HVAC requirement and process traceability spec

- facility-security.md: continuous temperature/humidity/PM control, zoned
  filtration, burning-season PM2.5 design point, HVAC in PV/battery sizing
- traceability.md: end-to-end per-order customer traceability, batch
  genealogy, log-at-source principles, machine data access as a
  procurement requirement

docs/suppliers/equipment-suppliers.md

@@ -160,6 +160,9 @@ Open: identify and qualify Thai/regional PVC compound producers.
 - Water treatment for boiler feed and closed-loop cooling
 - Compressed air generation
 - Hydraulic oil (~200 L, ISO VG 32/46 HLP per DIN 51524-2, per Newbilt spec)
+- Whole-factory HVAC: continuous temperature (20-26 °C), humidity (35-60%
+  RH), and PM control with zoned filtration tiers, sized for northern
+  Thailand burning-season PM2.5 peaks; a major load for PV/battery sizing
 - Clean rooms, ventilation, decontamination infrastructure for galvanics
 - Fire protection, exhaust work benches, PPE stock