feat: upgrade agent SDK to 0.2.92 with 1M context and 200k auto-compact

Use sonnet[1m] for full 1M context window and set auto-compact at 200k
tokens to keep costs down while preserving access to extended context.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

container/agent-runner/src/index.ts

@@ -449,6 +449,7 @@ async function runQuery(
             append: globalClaudeMd,
           }
         : undefined,
+      model: 'sonnet[1m]',
       allowedTools: [
         'Bash',
         'Read',
@@ -623,7 +624,10 @@ async function main(): Promise<void> {
 
   // Credentials are injected by the host's credential proxy via ANTHROPIC_BASE_URL.
   // No real secrets exist in the container environment.
-  const sdkEnv: Record<string, string | undefined> = { ...process.env };
+  const sdkEnv: Record<string, string | undefined> = {
+    ...process.env,
+    CLAUDE_CODE_AUTO_COMPACT_WINDOW: '200000',
+  };
 
   const __dirname = path.dirname(fileURLToPath(import.meta.url));
   const mcpServerPath = path.join(__dirname, 'ipc-mcp-stdio.js');