fix: change the default maxDbs of root acct to INT16_MAX

src/mnode/src/mnodeAcct.c

@@ -215,7 +215,7 @@ static int32_t mnodeCreateRootAcct() {
   taosEncryptPass((uint8_t *)TSDB_DEFAULT_PASS, strlen(TSDB_DEFAULT_PASS), pAcct->pass);
   pAcct->cfg = (SAcctCfg){
     .maxUsers           = 128,
-    .maxDbs             = 128,
+    .maxDbs             = INT16_MAX,
     .maxTimeSeries      = INT32_MAX,
     .maxConnections     = 1024,
     .maxStreams         = 1000,

tests/script/unique/account/paras.sim

@@ -17,7 +17,7 @@ endi
 if $data02 != 3/128 then 
   return -1
 endi
-if $data03 != 0/128 then 
+if $data03 != 0/32767 then
   return -1
 endi
 if $data04 != 0/2147483647 then