Add Pheenix galvanics flyers and Sibert stamper prep specs

docs/equipment/pheenix-alpha/: the four Pheenix Alpha electroforming flyers
(2024: PASU silvering, PPPU pre-plating, PDPU dual-cell plating, PMPB
passivation bench), renamed from their download hashes.
docs/equipment/sibert/: the VSP, VSF and VSC technical specifications
(2021), plus Sibert's 2008-09 optical-disc SPS literature and the 2008
Blu-ray stamper characteristics paper in sps-optical-disc-2009/. Two
byte-identical duplicates in the download were dropped.

New docs/equipment/galvanics.md, the metal-path counterpart to
pressing-line.md: datasheet tables for both ranges and what they change.
Pheenix is a second turnkey galvanics vendor next to Digital Matrix and
can quote lacquer-to-record as one vendor; neither range includes water
treatment. Utilities from the sheets (~27 kVA connected per line, DI water,
12-20 C cooling water, extraction sizes), ~5.6 m2 of footprint, and a cell
count estimate (one PDPU at the low end, two at the high end). The Sibert
machines are single-phase, 200/250/600 kg on castors, centre manually and
list no data interface; the VSC locates on the punched hole; the finisher's
water carries nickel. Weights, cycle times, prices and mould fit are listed
as quote questions.

Backlinks and small updates: README (bullet, layout tree, vendor list),
roadmap items 6 and 23, vendor landscape, supplier map, exhibitor briefing
(on-file notes, Sibert three-phase question answered), digital factory
(Pheenix PLC data, Sibert data question, RFQ clause 5), quality automation
(hardness on the centre slug, BD paper as the acceptance-spec model),
sustainability (finisher water), total investment block label (numbers
unchanged), scale (galvanics feeder note), crane weight table, process
flow, pressing-line stamper-fit question, plant page detail lines.

README.md

@@ -35,8 +35,9 @@ In-house galvanics (steps 3 and 4) removes the dependency on overseas stamper
 suppliers, a common bottleneck for pressing plants, and shortens turnaround
 for clients. Partnering with local carton manufacturers keeps packaging
 sourcing close to the plant, in line with the local-sourcing preference for
-materials. The pressing line is documented in detail; equipment, partners,
-and budgets for the other steps are open planning items.
+materials. The pressing line is documented in detail, galvanics and stamper
+prep from vendor datasheets; equipment, partners, and budgets for the other
+steps are open planning items.
 
 ## Project Status
 
@@ -60,12 +61,19 @@ The detail lives in dedicated documents:
 - [Pressing line equipment plan](docs/equipment/pressing-line.md): the
   50/50 automated/semi-automatic fleet strategy, the Newbilt system under
   evaluation (~USD 232k quoted scope), and site requirements
+- [Galvanics and stamper prep equipment plan](docs/equipment/galvanics.md):
+  the metal path from lacquer to press-ready stamper, from vendor
+  datasheets: Pheenix Alpha's electroforming range as a second turnkey
+  vendor next to Digital Matrix, Sibert's VSP/VSF/VSC stamper prep line,
+  the utilities they need, a first cell-count estimate, and Sibert's
+  optical-disc reference material
 - [Vendor landscape](docs/suppliers/vendor-landscape.md): researched
   candidates for mastering and cutting (Agnew Analog, and the Sillitoe
   SDMS with integrated cutting automation at a published USD 125k),
   galvanics equipment
-  (Plating Power / Digital Matrix), stamper preparation (Sibert), bridge
-  stamper service (Stamper Discs), and automated presses (Pheenix Alpha)
+  (Plating Power / Digital Matrix, Pheenix Alpha), stamper preparation
+  (Sibert), bridge stamper service (Stamper Discs), and automated presses
+  (Pheenix Alpha)
 - [Equipment needs and supplier map](docs/suppliers/equipment-suppliers.md):
   the full needs list per production step with supplier tables and contacts
 - [Sustainability](docs/sustainability.md): the solar installation (Deye
@@ -162,6 +170,10 @@ docs/
 ├── equipment/
 │   ├── newbilt/           Offers, site requirements, process schematic,
 │   │                      service rates, 2026 product flyers (vendor PDFs)
+│   ├── pheenix-alpha/     Electroforming range flyers (vendor PDFs)
+│   ├── sibert/            Stamper prep specifications, 2008-09 optical-disc
+│   │                      literature (vendor PDFs)
+│   ├── galvanics.md       Electroforming and stamper prep equipment plan
 │   └── pressing-line.md   Press fleet strategy and equipment plan
 ├── finance/               Project cost overviews, revenue model,
 │                          construction RFQ