Stufe 4c (#764): Bezeichner auf Englisch - Typen, Methoden, Felder, Parameter, Locals, Testnamen

Mit Roslyn umbenannt (Verweise folgen, Zeichenketten bleiben unberuehrt).
Nicht umbenannt, weil gespeichert oder ueber die API gebunden (Stufe 4e):
Properties, Record-Parameter, Enum-Member sowie die Parameter der
Endpunkt-Handler (Routen-/Query-Bindung ueber den Namen). Die JSON-Felder
anonymer Objekte bleiben ausdruecklich benannt (JsonFilter: pfad).

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

tests/ClawdDotNet.Core.Tests/Engine/PromptCacheTests.cs

@@ -20,7 +20,7 @@ public sealed class PromptCacheTests
     [InlineData("on", "openai/gpt-4o", true)]
     [InlineData("off", "anthropic/claude-sonnet-4-5", false)]
     [InlineData("OFF", "anthropic/claude-sonnet-4-5", false)]
-    public void Aktivierung_richtet_sich_nach_Einstellung_und_Modell(string setting, string model, bool expected)
+    public void Activation_depends_on_setting_and_model(string setting, string model, bool expected)
     {
         PromptCache.IsEnabledFor(setting, model).ShouldBe(expected);
     }
@@ -30,7 +30,7 @@ public sealed class PromptCacheTests
     // ═══════════════════════════════════════════════════════════
 
     [Fact]
-    public void Der_SystemPrompt_bekommt_einen_Breakpoint()
+    public void The_SystemPrompt_gets_a_breakpoint()
     {
         var messages = Conversation.Start("System").User("Frage").Build();
 
@@ -41,7 +41,7 @@ public sealed class PromptCacheTests
     }
 
     [Fact]
-    public void Die_letzte_Nachricht_mit_Inhalt_bekommt_einen_rollierenden_Breakpoint()
+    public void The_last_message_with_content_gets_a_rolling_breakpoint()
     {
         var messages = Conversation.Start().User("A").Assistant("B").User("C").Build();
 
@@ -52,7 +52,7 @@ public sealed class PromptCacheTests
     }
 
     [Fact]
-    public void Eine_AssistantNachricht_ohne_Inhalt_traegt_keinen_Breakpoint()
+    public void An_assistant_message_without_content_carries_no_breakpoint()
     {
         // assistant with tool_calls has no text content and cannot carry a block.
         var messages = Conversation.Start().User("A").Build();
@@ -67,7 +67,7 @@ public sealed class PromptCacheTests
     }
 
     [Fact]
-    public void Es_werden_hoechstens_zwei_Breakpoints_gesetzt()
+    public void At_most_two_breakpoints_are_set()
     {
         // Providers only allow a limited number — they must not accumulate.
         var messages = Conversation.Start().Repeat(10).Build();
@@ -78,7 +78,7 @@ public sealed class PromptCacheTests
     }
 
     [Fact]
-    public void Wiederholtes_Anwenden_sammelt_keine_Breakpoints_an()
+    public void Repeated_application_does_not_accumulate_breakpoints()
     {
         var messages = Conversation.Start().Repeat(3).Build();
 
@@ -93,7 +93,7 @@ public sealed class PromptCacheTests
     }
 
     [Fact]
-    public void Eine_leere_Liste_fuehrt_nicht_zu_einem_Fehler()
+    public void An_empty_list_does_not_lead_to_an_error()
     {
         var messages = new List<ChatMessage>();
 
@@ -111,7 +111,7 @@ public sealed class PromptCacheTests
     /// That is exactly what this test protects against.
     /// </summary>
     [Fact]
-    public async Task Der_Praefix_bleibt_ueber_alle_Schritte_zeichengleich()
+    public async Task The_prefix_stays_identical_across_all_steps()
     {
         var fixture = new EngineFixture().WithTool(FakeTool.Returning("ok"));
         var agent = fixture.AddAgent("agent-cache", "TestTool");
@@ -142,7 +142,7 @@ public sealed class PromptCacheTests
     }
 
     [Fact]
-    public async Task Ohne_Caching_enthaelt_der_Request_kein_cache_control()
+    public async Task Without_caching_the_request_contains_no_cache_control()
     {
         var fixture = new EngineFixture().WithTool(FakeTool.Returning("ok"));
         var agent = fixture.AddAgent("agent-nocache", "TestTool");