refactor(battle-node): remove ScriptedBotParticipant and dev-affordance wiring

Deletes the scripted opponent and every entry point that created a
BattleType.Scripted session (the ?scripted=1 query opt-in, the
SoloDefaultsToScripted toggle, the resolver short-circuit, the WS handler case,
the bridge validation arm). Real two-client PvP and the Bot matchmaking-timeout
fallback are untouched. ResolveAsync drops its scriptedOptIn parameter.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

SVSim.EmulatedEntrypoint/Matching/IMatchingResolver.cs

@@ -10,10 +10,7 @@ namespace SVSim.EmulatedEntrypoint.Matching;
 /// regardless of which URL family carried the request:
 /// </para>
 /// <list type="number">
-///   <item>Honor the dev-affordance scripted opt-in (route flag and/or
-///         <see cref="BattleNodeOptions.SoloDefaultsToScripted"/>) — bypass pair-up,
-///         register a Scripted match, return immediately.</item>
-///   <item>Otherwise consult <see cref="IMatchingPairUpService"/> and translate the
+///   <item>Consult <see cref="IMatchingPairUpService"/> and translate the
 ///         resulting <see cref="PairUpResult"/> into a wire matching_state per the
 ///         3002 / 3004 / 3007 / 3011 vocabulary.</item>
 /// </list>
@@ -33,15 +30,9 @@ public interface IMatchingResolver
     /// <c>"rotation_rank_battle"</c>, <c>"unlimited_rank_battle"</c>).
     /// </param>
     /// <param name="player">Caller's <see cref="BattlePlayer"/> (viewer-id + built MatchContext).</param>
-    /// <param name="scriptedOptIn">
-    /// Per-request opt-in from a controller-specific signal (e.g. TK2's <c>?scripted=1</c>
-    /// query param). OR'd with <see cref="BattleNodeOptions.SoloDefaultsToScripted"/>;
-    /// either being true short-circuits to a Scripted match.
-    /// </param>
     Task<MatchingResolution> ResolveAsync(
         string mode,
         BattlePlayer player,
-        bool scriptedOptIn,
         CancellationToken ct);
 }