KarpelesLab / libwallet / 27809069357

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wltwallet: document canonical Promote/PromoteMnemonic committee + bump 0.4.65

Field report: tibaneapp's in-app mnemonic import flow was calling
Wallet:promoteMnemonic with newKeys = [Password] (a single key) and
surfacing the 500 error:

    PromoteMnemonic: New must contain at least 2 KeyDescriptions (got 1)

The validation is correct — modern FROST / DKLs23 wallets are
inherently multi-party so a single-party "threshold" scheme isn't a
meaningful sharing — but the error message gave no hint at the
expected shape, leaving the caller no actionable path.

This commit:
  - Extends Promote and PromoteMnemonic godocs with a "New committee
    shape" section. Canonical layout is [StoreKey, RemoteKey, Password]
    with threshold 1 (same shape the standard Wallet:multiCreate
    pipeline uses), and the doc explains the recovery semantics of
    1-of-3 vs the degraded 1-of-2 fallbacks.
  - Tightens both error messages to point at the godoc:
      "got 1 — canonical shape is [StoreKey, RemoteKey, Password]
       with threshold 1; see Promote(Mnemonic) godoc for the full
       layout"

No functional change. tibaneapp's caller is being updated in lockstep
to mint the full committee.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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