[codex] fix(smithy): update Codex interactive CLI flags

[fnnzzz]

Summary

• Replace Codex interactive --full-auto launches with supported --sandbox workspace-write --ask-for-approval never flags.
• Apply the replacement to both fresh interactive sessions and resumed sessions.
• Update Smithy provider tests and add a patch changeset for @stoneforge/smithy.

Root Cause

Recent Codex CLI versions reject --full-auto, so Director and persistent-worker interactive PTYs exit before the Codex TUI starts.

Evidence

Local reproduction against the currently installed Codex CLI:

$ codex --version
codex-cli 0.128.0

$ codex --full-auto --help
error: unexpected argument '--full-auto' found

  tip: to pass '--full-auto' as a value, use '-- --full-auto'

Usage: codex [OPTIONS] [PROMPT]
       codex [OPTIONS] <COMMAND> [ARGS]

For more information, try '--help'.

codex --help lists the replacement flags used here:

-s, --sandbox <SANDBOX_MODE>
-a, --ask-for-approval <APPROVAL_POLICY>
-C, --cd <DIR>

Validation

• bun test src/providers/codex/provider.bun.test.ts
• pnpm run typecheck
• pnpm run build
• pnpm run test

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