NEO-146: fix record struct docs and collection spread in tests

Replace param XML on record struct mutation outcomes with summary cref
docs to avoid Roslynator RCS1263 false positives; apply IDE0305 in
RewardRouterOperationsTests and update style guide guidance.

.cursor/rules/csharp-style.md

@@ -133,7 +133,7 @@ var store = secondScope.ServiceProvider.GetRequiredService<IExampleStore>(); //
 ## Documentation
 
 - Use **`///` XML doc comments** on public APIs (types and members) when behavior or contracts are not obvious.
-- **Primary-constructor records:** include a **`<summary>`** plus **`<param>`** for every constructor parameter (Roslynator RCS1139 / RCS1263). Do not leave orphaned `<param>` lines without a summary on the type.
+- **Primary-constructor records:** include a **`<summary>`** on the type. Prefer **`<see cref="PropertyName"/>`** in the summary for positional parameters. Do **not** use **`<param>`** on **`record struct`** primary constructors — Roslynator reports false-positive **RCS1263** ([roslynator#1730](https://github.com/dotnet/roslynator/issues/1730)). **`record class`** / **`class`** primary constructors may use `<param>` when the analyzer accepts them.
 
 ## Null checks (IDE0270)
 

server/NeonSprawl.Server.Tests/Game/Rewards/RewardRouterOperationsTests.cs

@@ -803,7 +803,7 @@ public sealed class RewardRouterOperationsTests
             var filtered = rows.Where(r => r.PlayerId == normalized).ToList();
             if (limit is > 0)
             {
-                return filtered.Take(limit.Value).ToList();
+                return [.. filtered.Take(limit.Value)];
             }
 
             return filtered;

server/NeonSprawl.Server/Game/Gathering/ResourceNodeInstanceMutationOutcome.cs

@@ -10,10 +10,11 @@ public enum ResourceNodeInstanceMutationKind
     Applied,
 }
 
-/// <summary>Result of <see cref="ResourceNodeInstanceOperations.TryCommitSuccessfulGatherDecrement"/> (NEO-61).</summary>
-/// <param name="Kind">Applied or denied.</param>
-/// <param name="ReasonCode">Populated when <see cref="Kind"/> is <see cref="ResourceNodeInstanceMutationKind.Denied"/>.</param>
-/// <param name="Snapshot">Authoritative snapshot after apply, or current snapshot on depletion deny; null for unknown node.</param>
+/// <summary>
+/// Result of <see cref="ResourceNodeInstanceOperations.TryCommitSuccessfulGatherDecrement"/> (NEO-61).
+/// <see cref="ReasonCode"/> is populated when <see cref="Kind"/> is <see cref="ResourceNodeInstanceMutationKind.Denied"/>.
+/// <see cref="Snapshot"/> is the authoritative snapshot after apply, or the current snapshot on depletion deny; null for unknown node.
+/// </summary>
 public readonly record struct ResourceNodeInstanceMutationOutcome(
     ResourceNodeInstanceMutationKind Kind,
     string? ReasonCode,

server/NeonSprawl.Server/Game/Items/PlayerInventoryMutationOutcome.cs

@@ -13,10 +13,11 @@ public enum PlayerInventoryMutationKind
     Applied,
 }
 
-/// <summary>Result of <see cref="PlayerInventoryOperations.TryAddStack"/> or <see cref="PlayerInventoryOperations.TryRemoveStack"/> (NEO-54).</summary>
-/// <param name="Kind">Applied, denied, or store missing.</param>
-/// <param name="ReasonCode">Populated when <see cref="Kind"/> is <see cref="PlayerInventoryMutationKind.Denied"/>.</param>
-/// <param name="Snapshot">Authoritative snapshot after apply, or unchanged snapshot on deny; null when store missing.</param>
+/// <summary>
+/// Result of <see cref="PlayerInventoryOperations.TryAddStack"/> or <see cref="PlayerInventoryOperations.TryRemoveStack"/> (NEO-54).
+/// <see cref="ReasonCode"/> is populated when <see cref="Kind"/> is <see cref="PlayerInventoryMutationKind.Denied"/>.
+/// <see cref="Snapshot"/> is the authoritative snapshot after apply, or unchanged snapshot on deny; null when store missing.
+/// </summary>
 public readonly record struct PlayerInventoryMutationOutcome(
     PlayerInventoryMutationKind Kind,
     string? ReasonCode,