fix(profiles): exclude session history, backups, and snapshots from --clone-all (#45246)

--clone-all copied the source profile's state.db, sessions/, backups/,
state-snapshots/, and checkpoints/ into the new profile. These are
per-profile history: a 49GB copy in practice (15GB snapshots + 11GB
backup archives + 16GB state.db + 6.4GB sessions), and restoring a
copied backup inside the clone would resurrect the SOURCE profile's
state. A clone is a fresh workspace; history stays with the source.

New _CLONE_ALL_HISTORY_EXCLUDE_ROOT set, applied at root level for ANY
source profile (named profiles accumulate the same artifacts), unlike
the default-gated infrastructure excludes. Nested same-name dirs still
copy. Docs and the post-create CLI message updated to match; profile
export / hermes backup remain the full-history paths.

hermes_cli/main.py

@@ -9849,7 +9849,10 @@ def cmd_profile(args):
                     getattr(args, "clone_from", None) or get_active_profile_name()
                 )
                 if clone_all:
-                    print(f"Full copy from {source_label}.")
+                    print(
+                        f"Full copy from {source_label} "
+                        "(excluding session history, backups, and snapshots)."
+                    )
                 else:
                     print(
                         f"Cloned config, .env, SOUL.md, and skills from {source_label}."