build: slim sdist and bump anp to 0.6.8

chore: bump anp package to 0.6.7

feat: enhance hpke e2ee 1.1 flow

chore: bump version to 0.6.4

feat: add failed_msg_id to E2eeErrorContent and build_e2ee_error

chore: auto-commit 1 file(s) at 2026-03-04 00:00:47

feat: add WNS (WBA Name Space) module for Handle resolution and binding verification

feat: add sender_key_not_found error code to HPKE E2EE module

feat: add HPKE E2EE examples and fix ECDSA signature encoding bug

update anp version

feat: add HPKE-based E2EE module and optimize DID document key interfaces

bugfix

update readme

modify service to aud

docs: add DID WBA authentication integration guide (CN/EN)