first half pass at new dbgi fuzzy searching functionality; distributes search amongst sub-tasks

src/text_cache/text_cache.c

@@ -2133,6 +2133,7 @@ txt_u2p_dequeue_req(U128 *hash_out, TXT_LangKind *lang_out)
 
 ASYNC_WORK_DEF(txt_parse_work)
 {
+  ProfBeginFunction();
   //- rjf: get next key
   U128 hash = {0};
   TXT_LangKind lang = TXT_LangKind_Null;
@@ -2323,6 +2324,7 @@ ASYNC_WORK_DEF(txt_parse_work)
   }
   
   hs_scope_close(scope);
+  ProfEnd();
   return 0;
 }