Merge main into fix/db-off-data-plane-469

Brings in the two commits main gained: #472 (CLI cleanup — remove `info`,
split `list active` into a top-level `active`, simplify `list`) and the
terminology glossary. #472 was written against the old flat cli/ layout,
so its semantics are reconciled into the reorg'd cli/commands/ structure:

  * new `active` command lives at cli/commands/active.py, registered in
    the lazy registry and listed in `help` (not left at the flat path).
  * `info` removed: deleted cli/commands/info.py, dropped from the
    registry and `help`.
  * `list` simplified to list-available-only, using the reorg's
    os.getcwd()/constants.PROG conventions.
  * the `list active` -> `active` doc wording applied to the backend
    docstrings that our split moved into base.py / selection.py.

Our reorg wins for the fully-rewritten dispatcher (cli/__init__ shim,
backend facade). pyright: 0 errors. Full unit suite green (2243).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

bot_bottle/backend/selection.py

@@ -168,7 +168,7 @@ def has_backend(name: str) -> bool:
 
 def enumerate_active_agents() -> list[ActiveAgent]:
     """All currently-running agents, across every available
-    backend. Used by CLI `list active` and the dashboard's agents
+    backend. Used by CLI `active` and the dashboard's agents
     pane so neither has to know which backends exist. Skips
     backends whose `is_available()` reports False.