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.

docs/digital-factory.md

@@ -424,11 +424,16 @@ for the archive.
 ### Galvanics (Expand phase)
 
 Rectifier current, voltage and ampere-hours per cell (Digital Matrix: ask
-what the control rings and rectifiers expose; Modbus is the requirement),
+what the control rings and rectifiers expose; Pheenix Alpha: its plating
+units are PLC-controlled with a network connection, protocol unstated, see
+[galvanics and stamper prep](equipment/galvanics.md); Modbus is the
+requirement),
 bath temperature, pH and conductivity from transmitters, filtration and
 agitation pump states, fume extraction running status (the interlock itself
 stays hard-wired), rinse water conductivity and evaporator state. Titration
-results are entered at a station against the bath ID.
+results are entered at a station against the bath ID. On the Pheenix
+units, the machine's own alerts (filter cartridge change, nickel pellet
+top-up, anode basket cleaning) are logged as bath events.
 
 ### Site systems
 
@@ -441,8 +446,9 @@ production data.
 
 ### What produces no telemetry
 
-The Sibert stamper-prep machines and the shrink wrapper produce no machine
-data, and neither does the mastering chain on the Agnew route. They get
+The Sibert stamper-prep machines (their 2021 specifications list no data
+or network interface; Sibert's 2009 optical-disc punch offered barcode and
+LAN options, so ask) and the shrink wrapper produce no machine data, and neither does the mastering chain on the Agnew route. They get
 station check-ins: who, when, which part, which parameters, with files
 attached (cutting parameters, DAW session export). The room environment
 around them is logged by the sensors above.
@@ -635,8 +641,10 @@ To go into every RFQ that leaves from [roadmap](roadmap.md) items 4 to 8:
    structured cabling, a VLAN-capable industrial switch in every cabinet,
    and Omada-managed switches and APs for the building so the gateway's
    existing Omada controller covers the site.
-5. **Galvanics (Digital Matrix)**: what the rectifiers and control rings
-   expose, and how; Modbus preferred.
+5. **Galvanics (Digital Matrix, Pheenix Alpha)**: what the rectifiers,
+   control rings and PLCs expose, and how; Modbus preferred; remote support
+   through our mesh, no vendor cloud. **Sibert**: whether the VS machines
+   can take a stamper serial in and write the centring result out.
 6. **Metrology (Keyence Thailand)**: confirmed CSV/3D export paths and
    whether the instrument software can write to a network share unattended.
 7. **Vision integrator**: result string format, image push over SFTP,