chore: update GPT-5.2 references to GPT-5.4

Align runtime defaults, tests, docs, and generated artifacts with the newer GPT-5.4 baseline. Keep think-mode and prompt-routing expectations consistent after the model version bump.

src/tools/delegate-task/sync-continuation.test.ts

@@ -365,7 +365,7 @@ describe("executeSyncContinuation - toast cleanup error paths", () => {
           data: [
             { info: { id: "msg_001", role: "user", time: { created: 1000 }, agent: "oracle" } },
             {
-              info: { id: "msg_002", role: "assistant", time: { created: 2000 }, finish: "end_turn", agent: "oracle", providerID: "openai", modelID: "gpt-5.2" },
+              info: { id: "msg_002", role: "assistant", time: { created: 2000 }, finish: "end_turn", agent: "oracle", providerID: "openai", modelID: "gpt-5.4" },
               parts: [{ type: "text", text: "Response" }],
             },
           ],