Vectored rows recorded: HardpointData.Row, ThrusterData.Slew, the judge's row rules

Thruster hardpoints state a gimbal arc in FiringArc and join a row by Row (key 7);
the thruster design carries its slew (key 6). The judge refuses a Row on a
non-thruster, rows whose members disagree on Rotation or FiringArc, and a fixed
thruster, a mixed or split row, or a joint too short for the arc on a joint. Bind
treats a thruster emitter's joint as it treats a gun mount's. Not yet verified:
this commit has not been built.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assets/Scripts/ServerShared/ItemData.cs

@@ -566,7 +566,12 @@ public class HardpointData
     [Inspectable, JsonProperty("armor"), Key(5)] public float Armor;
     // Full arc width in degrees a weapon on this hardpoint may bear across; 0 means "use
     // GameplaySettings.FiringArc" (docs/fire-control-cut.md R6). Turrets author 360 (Q1).
+    // On a Thruster hardpoint it is the full gimbal width: the row swings +-FiringArc/2 about Rotation, 0 is a
+    // fixed thruster, and there is no GameplaySettings fallback.
     [Inspectable, JsonProperty("firingArc"), Key(6)] public float FiringArc;
+    // Thruster hardpoints sharing a non-empty Row swing as one row; a Thruster hardpoint with FiringArc > 0 and no Row
+    // is a row of one. Only a Thruster hardpoint may state one.
+    [Inspectable, JsonProperty("row"), Key(7)] public string Row;
 
     public override string ToString()
     {