fix(container): point SDK to pnpm-installed Claude Code binary

The Agent SDK's default binary resolution picks the musl-linked native
binary (claude-agent-sdk-linux-arm64-musl), which cannot execute on the
Debian-based container image (glibc). Explicitly set
pathToClaudeCodeExecutable to /pnpm/claude — the pnpm global symlink
that resolves to the correct glibc binary regardless of architecture.

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

container/agent-runner/src/providers/claude.ts

@@ -271,6 +271,7 @@ export class ClaudeProvider implements AgentProvider {
         cwd: input.cwd,
         additionalDirectories: this.additionalDirectories,
         resume: input.continuation,
+        pathToClaudeCodeExecutable: '/pnpm/claude',
         systemPrompt: instructions ? { type: 'preset' as const, preset: 'claude_code' as const, append: instructions } : undefined,
         allowedTools: TOOL_ALLOWLIST,
         disallowedTools: SDK_DISALLOWED_TOOLS,