[Server/Client/Protocol] Address developer role review feedback

Address ZeizaZach's review of the developer staff role:

- Nudge the developer log query to exclude private chat and sender IPs
  (the ModeratorCommand path still sees everything).
- Deduplicate Command_GetLogHistory into Command_ViewLogHistory, which now
  extends both ModeratorCommand (ext) and DeveloperCommand (dev_ext); the
  client picks the DeveloperCommand-scoped extension by extendee, and the
  server reads it via the extension number.
- Pull the uptime snapshot SQL into Servatrice_DatabaseInterface as
  getLatestUptimeSnapshot() and widen the reported counters to 64-bit.
- Document the admin bitfield (1 admin, 2 moderator, 4 judge, 8 developer)
  and add a server-side test for the developer command path.

libcockatrice_protocol/libcockatrice/protocol/pb/CMakeLists.txt

@@ -22,11 +22,10 @@ set(PROTO_FILES
     command_del_counter.proto
     command_delete_arrow.proto
     command_draw_cards.proto
-    command_get_log_history.proto
-    command_get_server_stats.proto
     command_dump_zone.proto
     command_flip_card.proto
     command_game_say.proto
+    command_get_server_stats.proto
     command_inc_card_counter.proto
     command_inc_counter.proto
     command_kick_from_game.proto

libcockatrice_protocol/libcockatrice/protocol/pb/command_get_log_history.proto

@@ -1,19 +0,0 @@
-syntax = "proto2";
-import "developer_commands.proto";
-
-// Developer counterpart of Command_ViewLogHistory: identical query fields, but
-// routed through the developer command family so developers never need the
-// moderator command container.
-message Command_GetLogHistory {
-    extend DeveloperCommand {
-        optional Command_GetLogHistory ext = 1001;
-    }
-    optional string user_name = 1;       // user that created message
-    optional string ip_address = 2;      // ip address of user that created message
-    optional string game_name = 3;       // client id of user that created the message
-    optional string game_id = 4;         // game number the message was sent to
-    optional string message = 5;         // raw message that was sent
-    repeated string log_location = 6;    // destination of message (ex: main room, game room, private chat)
-    required uint32 date_range = 7;      // the length of time (in minutes) to look back for
-    optional uint32 maximum_results = 8; // the maximum number of query results
-}

libcockatrice_protocol/libcockatrice/protocol/pb/moderator_commands.proto

@@ -1,4 +1,5 @@
 syntax = "proto2";
+import "developer_commands.proto";
 message ModeratorCommand {
     enum ModeratorCommandType {
         BAN_FROM_SERVER = 1000;
@@ -80,6 +81,9 @@ message Command_ViewLogHistory {
     extend ModeratorCommand {
         optional Command_ViewLogHistory ext = 1005;
     }
+    extend DeveloperCommand {
+        optional Command_ViewLogHistory dev_ext = 1001;
+    }
     optional string user_name = 1;       // user that created message
     optional string ip_address = 2;      // ip address of user that created message
     optional string game_name = 3;       // client id of user that created the message