fix(agent): sync logging session context on compaction id rotation

When context compaction rotates agent.session_id, it updates the gateway/tools
session context (set_current_session_id -> HERMES_SESSION_ID env + ContextVar)
but never updates the separate logging session context. The [session_id] tag on
log lines comes from hermes_logging._session_context (set once per turn in
conversation_loop.py), so post-compaction log lines in the same turn carry the
STALE old id while the message/DB/gateway state carry the new one — breaking log
correlation exactly at the compaction boundary.

Call hermes_logging.set_session_context(agent.session_id) alongside the existing
set_current_session_id, guarded so a logging failure can't regress the routing
update. Logs-only; no runtime or caching impact.

Refs #34089

agent/conversation_compression.py

@@ -513,6 +513,21 @@ def compress_context(
                 set_current_session_id(agent.session_id)
             except Exception:
                 os.environ["HERMES_SESSION_ID"] = agent.session_id
+            # The gateway/tools session context (ContextVar + env) and the
+            # logging session context are SEPARATE mechanisms. The call above
+            # moves the former; the ``[session_id]`` tag on log lines comes
+            # from ``hermes_logging._session_context`` (set once per turn in
+            # conversation_loop.py). Without this, post-rotation log lines in
+            # the same turn keep the STALE old id while the message/DB/gateway
+            # state carry the new one — breaking log correlation exactly at the
+            # compaction boundary (see #34089). Guarded separately so a logging
+            # failure can never regress the routing update above.
+            try:
+                from hermes_logging import set_session_context
+
+                set_session_context(agent.session_id)
+            except Exception:
+                pass
             agent._session_db_created = False
             agent._session_db.create_session(
                 session_id=agent.session_id,