fix(state): exclude tool calls from trigram FTS

Keep structured tool_calls searchable through the standard FTS index while
removing their repetitive JSON from the trigram projection. Reuse the
existing optimize-storage rebuild path for deployed v1 layouts.

Co-authored-by: liuhao1024 <sunsky.lau@gmail.com>

hermes_state_schema.py

@@ -1528,7 +1528,10 @@ class SessionSchemaMixin:
                 # advances to SCHEMA_VERSION here like every other migration —
                 # future v24+ migrations land automatically for legacy-FTS
                 # users too. Only the FTS *layout* waits for opt-in.
-                if fts5_available and self._db_has_legacy_inline_fts(cursor):
+                if (
+                    fts5_available
+                    and self._db_needs_fts_storage_upgrade(cursor)
+                ):
                     self.set_meta("fts_optimize_available", "1", cursor=cursor)
 
             if current_version < 25:
@@ -1561,7 +1564,7 @@ class SessionSchemaMixin:
             # transition actually completes.
             if (
                 fts5_available
-                and not self._db_has_legacy_inline_fts(cursor)
+                and not self._db_needs_fts_storage_upgrade(cursor)
                 and cursor.execute(
                     "SELECT 1 FROM state_meta "
                     "WHERE key = 'fts_rebuild_high_water' LIMIT 1"