Nine f-string sites minted `YYYYMMDD_HHMMSS_<hex>` independently with the hex width already
drifted (6 on CLI/TUI/agent/import, 8 in the gateway store, 12 in portability imports).
hermes_cli/session_lost_and_found.py classifies schema-less salvage rows by that shape, so a
site drifting the prefix would silently change recovery. hermes_state_ids.new_session_id(now,
hex_len=) is now the only writer and owns SESSION_ID_PATTERN; stdlib-only so agent/, cli.py and
gateway/ can import it without the SessionDB graph.
Widths are kept per site on purpose: the Desktop's session-id candidate regex is pinned to 6 hex
chars for interactive ids; the gateway store and portability importer keep 8/12 (more rows per
second). Not a bug, so not "fixed".
gateway/platforms/qqbot/adapter.py hard-coded `agent:main:qqbot:<scene>:<chat>` for the
update-prompt authz key, ignoring the profile namespace build_session_key applies; a secondary
bot in a multiplexed gateway got `agent:<profile>:...` keys and its clicks were rejected. The key
now comes from the one builder via BasePlatformAdapter._source_session_key.
Behavior change: QQ update-prompt clicks are authorized under the profile-namespaced key
(byte-identical `agent:main:` for the default profile).
For each issue anchor present in BASE 63279301bc non-test .py and absent on HEAD, the BASE comment/docstring block was re-attached at the HEAD location of the code it explained (matched by the distinctive code line / enclosing def). Sentences already covered by an existing HEAD comment were deduped; the issue number always survives. Insert-only: no code lines changed.
