fix: CodeRabbit auto-fixes for PR #71

[coderabbitai]

This stacked PR contains CodeRabbit auto-fixes for #71.

Files modified:

• bridges/codex/approvals_test.go
• bridges/codex/backfill.go
• bridges/codex/client.go
• bridges/codex/metadata.go
• bridges/codex/stream_events.go
• bridges/openclaw/events.go
• bridges/opencode/opencodebridge/opencode_manager.go
• docs/matrix-ai-matrix-spec-v1.md
• pkg/bridgeadapter/approval_prompt.go
• pkg/bridgeadapter/base_reaction_handler.go

[coderabbitai]

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