Plan the overhead crane, maintenance workshop and visitor corridor

New docs/crane-workshop-tours.md: a 5 t single-girder EOT crane over the
whole production compartment (stops at the warehouse fire wall), a
machine door and crane-served workshop/machine bay at the ramp end, and
a glazed ground-level visitor corridor along the car-park elevation with
stations in process order, its own air and acoustic glazing so tours
need no PPE. Covers what each changes in the shell (crane-ready frame,
hook height under the 7.0 m eave, no full-height cross walls in the
crane zone, room lids and crane hatches), safety, costs and open
decisions.

Propagated: construction RFQ (crane-ready frame, new section 1c, machine
door, accessible 1:12 entrance now required), scale zone table (+210 to
280 m2, total ~1,400 to 2,000 m2), facility security, worker safety,
roadmap items 9 and 15, total investment added-scope table, README.

docs/scale.md

@@ -54,13 +54,24 @@ running the same machine.
 | Packaging + finished goods warehouse | ~300 to 500 m² |
 | Utility rooms (boiler, compressor, chiller, electrical) | ~100 to 150 m² |
 | Offices, QC/listening, archive, IT, entrance | ~150 to 200 m² |
+| Maintenance workshop and machine bay (crane-served) | ~100 to 150 m² |
+| Visitor corridor (glazed, ground level) | ~110 to 130 m² |
 | Circulation, walls, misc | ~150 to 250 m² |
-| **Total under roof** | **~1,200 to 1,700 m²** |
+| **Total under roof** | **~1,400 to 2,000 m²** |
 
 The HVAC budget in the utilities CSV already assumes ~1,500 m² conditioned.
 Single story throughout: all heavy equipment needs ground-slab floor
 loading (multiple tons per m²).
 
+The workshop and the visitor corridor were added in October 2026, together
+with an overhead crane over the production compartment; what they need and
+what they change in the shell is in
+[crane, workshop and tours](crane-workshop-tours.md). They add ~210 to
+280 m² to a program that already filled the 60 × 25 m footprint, which
+settles the open question below in favour of growing the program into the
+floor the utility yard frees: at the lower half of the table everything
+fits; at the upper half, finished goods move to the phase 2 building.
+
 ### Detached utility yard, parking, and what that moves
 
 The massing model puts the boiler and chiller in a **detached utility yard**