feat(core): port v2 runtime fixes onto dev

Cherry-picks the packages/core changes from the v2 branch onto dev:
- combined ordered stdout/stderr in AppProcess + bash structured output
- edit/apply-patch return FileDiff info with status and line stats
- ignore no-op model switches; record reasoning timestamps
- return unexpected local tool defects to the model and continue
- keep OAuth account metadata out of request bodies
- nest OpenAI reasoning effort/summary options
- load OpenCode provider config asynchronously; batch plugin boot
- export latest public event manifest

Includes the supporting schema reasoning time field and regenerated
client/SDK types.

packages/schema/src/session-message.ts

@@ -150,6 +150,10 @@ export const AssistantReasoning = Schema.Struct({
   id: Schema.String,
   text: Schema.String,
   providerMetadata: ProviderMetadata.pipe(optional),
+  time: Schema.Struct({
+    created: DateTimeUtcFromMillis,
+    completed: DateTimeUtcFromMillis.pipe(optional),
+  }).pipe(optional),
 }).annotate({ identifier: "Session.Message.Assistant.Reasoning" })
 
 export const AssistantContent = Schema.Union([AssistantText, AssistantReasoning, AssistantTool]).pipe(