Merge Modelfamily into modelinfo (#8763)

- Merge ModelFamily into ModelInfo
- Remove logic for adding instructions to apply patch
- Add compaction limit and visible context window to `ModelInfo`

codex-rs/core/tests/suite/client.rs

@@ -806,7 +806,7 @@ async fn includes_no_effort_in_request() -> anyhow::Result<()> {
 }
 
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-async fn includes_default_reasoning_effort_in_request_when_defined_by_model_family()
+async fn includes_default_reasoning_effort_in_request_when_defined_by_model_info()
 -> anyhow::Result<()> {
     skip_if_no_network!(Ok(()));
     let server = MockServer::start().await;
@@ -1142,13 +1142,13 @@ async fn azure_responses_request_includes_store_and_reasoning_ids() {
     let model = ModelsManager::get_model_offline(config.model.as_deref());
     config.model = Some(model.clone());
     let config = Arc::new(config);
-    let model_family = ModelsManager::construct_model_family_offline(model.as_str(), &config);
+    let model_info = ModelsManager::construct_model_info_offline(model.as_str(), &config);
     let conversation_id = ThreadId::new();
     let auth_manager = AuthManager::from_auth_for_testing(CodexAuth::from_api_key("Test API Key"));
     let otel_manager = OtelManager::new(
         conversation_id,
         model.as_str(),
-        model_family.slug.as_str(),
+        model_info.slug.as_str(),
         None,
         Some("test@test.com".to_string()),
         auth_manager.get_auth_mode(),
@@ -1160,7 +1160,7 @@ async fn azure_responses_request_includes_store_and_reasoning_ids() {
     let client = ModelClient::new(
         Arc::clone(&config),
         None,
-        model_family,
+        model_info,
         otel_manager,
         provider,
         effort,