[Server/Client/Protocol] Add developer staff role

Introduce a Developer staff level (proto flag 32, DB admin bit 8) that
sits between admin and moderator: no kick/ban/warn/report/admin powers,
but gets server log access via a new developer command container family
(GET_SERVER_STATS, VIEWLOG_HISTORY) and an idle-timeout exemption.

- Protocol: IsDeveloper flag, developer_commands.proto envelope,
  Command_GetServerStats/Command_GetLogHistory, Response_GetServerStats,
  Command_AdjustMod.should_be_developer
- Servatrice: fail-closed developer dispatcher, uptime snapshot handler,
  shared log history handler reuse, bit-8 DB mapping
- Client: burgundy pawn/badge/labels/sort order, prepareDeveloperCommand,
  minimal Developer stats tab, log tab access, promote/demote actions

Took 24 minutes

Took 18 seconds

# Commit time for manual adjustment:
# Took 15 minutes

cockatrice/src/interface/widgets/tabs/tab_logs.h

@@ -33,6 +33,7 @@ class TabLog : public Tab
     Q_OBJECT
 private:
     AbstractClient *client;
+    bool canUseDeveloperCommands;
     QLabel *labelFindUserName, *labelFindIPAddress, *labelFindGameName, *labelFindGameID, *labelMessage, *labelMaximum,
         *labelDescription;
     LineEditUnfocusable *findUsername, *findIPAddress, *findGameName, *findGameID, *findMessage;
@@ -58,7 +59,7 @@ private slots:
     void restartLayout();
 
 public:
-    TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client);
+    TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client, bool _canUseDeveloperCommands = false);
     ~TabLog() override;
     void retranslateUi() override;
     [[nodiscard]] QString getTabText() const override