Merge branch 'release/2.6.0' into WALLET-1330-dep-3-crypto-vault-modernization

Integrate release/2.6.0 (DEP-2 squash-merged as #1377) into the DEP-3 branch.
Net content unchanged: DEP-3 already carried the same DEP-2 changes via individual
commits, so the 3-way merge keeps the DEP-3 crypto deps and resolves the package-lock
conflict to the equivalent tree. Records release/2.6.0 as an ancestor so the PR can be
retargeted to release/2.6.0 and merge cleanly.

Author: ost-ptk