[Fix] LFGDungeons.dbc field types and index

LfgDungeonsEntryfmt started with 'i' instead of the index marker 'n',
so DBCFileLoader::GetFormatRecordSize never sets index_pos and the
store is keyed by row instead of by dungeon ID. Row index equals ID
for 0 of 240 records, and 83 IDs are >= 240 and unreachable; every
sLfgDungeonsStore.LookupEntry(id) call returns the wrong record or
NULL.

Separately, mapID was typed float, so DBCFileLoader::getFloat
reinterpret-casts the raw int bytes and map 43 reads back as the
denormal 6.02558e-44; every consumer's (uint32) cast collapses to 0,
sending every LFD teleport to Eastern Kingdoms.

Adopt TC's verified format string "nsiiiiiiiiixxixixiiii", change
mapID to int32 (name kept to avoid touching the 3 consumer casts),
drop the four dead fields (faction, textureFilename, order_index,
description_lang -- zero readers anywhere in tree), and name the
trailing four columns Random_ID/Count_tank/Count_healer/Count_damage
to match server-four's names for the same DBC columns.

Entry() preserved verbatim. Verified all 13 LfgDungeonsEntry consumer
sites across LFGMgr.cpp, LFGMgrProposal.cpp, LFGMgrQueue.cpp reference
only fields retained by this change (ID, minLevel, maxLevel,
expansionLevel, difficulty, typeID, flags, mapID, group_id, Entry()).

MapID == -1 handling (49 rows) is a separate, later concern -- not
addressed here.

Author: r-log

src/game/Server/DBCStructure.h

@@ -1289,26 +1289,22 @@ struct ItemSetEntry
 struct LfgDungeonsEntry
 {
     uint32    ID;
-    DBCString    Name;
+    DBCString Name;
     uint32    minLevel;
     uint32    maxLevel;
     uint32    target_level;
     uint32    target_level_min;
     uint32    target_level_max;
-    float    mapID;
+    int32     mapID;
     uint32    difficulty;
     uint32    flags;
     uint32    typeID;
-    float    faction;
-    DBCString    textureFilename;
     uint32    expansionLevel;
-    DBCString    order_index;
     uint32    group_id;
-    DBCString    description_lang;
-    uint32    col17;
-    uint32    col18;
-    uint32    col19;
-    uint32    col20;
+    uint32    Random_ID;
+    uint32    Count_tank;
+    uint32    Count_healer;
+    uint32    Count_damage;
 
     uint32 Entry() const { return ID + ((uint8)typeID << 24); }
 };

src/game/Server/DBCfmt.h

@@ -93,7 +93,7 @@ const char ItemRandomPropertiesfmt[]="nxiiiiis";
 const char ItemRandomSuffixfmt[]="nsxiiiiiiiiii";
 const char ItemReforgefmt[]="nifif";
 const char ItemSetEntryfmt[]="dsxxxxxxxxxxxxxxxxxiiiiiiiiiiiiiiiiii";
-const char LfgDungeonsEntryfmt[] = "isiiiiifiiifsisisiiii";
+const char LfgDungeonsEntryfmt[] = "nsiiiiiiiiixxixixiiii";
 const char LiquidTypefmt[] = "nxxixixxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
 const char LockEntryfmt[] = "niiiiiiiiiiiiiiiiiiiiiiiixxxxxxxx";
 const char MailTemplateEntryfmt[]="nxs";