PP-QUANT-001 P4: #3077 support table GENERATED from `TRAITS` (type × backend × tier)

[noahgift]

Parent: #3421 · closes the type axis of #3077 · Slot: 0.70.0, after Q3 starts.
Mechanism: a hand-written support table is a fifth private qtype list.
Fix: doc table emitted from TRAITS + the kernel registry.
Falsifier: hand-edit the generated table → docs build RED.

Ĵ: 24 turns [A] — borrowed; estimate.sh aprender pools 0 of 47 ledger rows today, so there is no measured basis.
Plan + evidence: #3427 · design discussion: #3418

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