feat(codex): enrich Bash file-list PostToolUse output

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Summary

• Extend Codex Bash PostToolUse enrichment to classifier-recognized find ... -name / find ... -iname file-list output.
• Normalize Codex Bash BashActionFindName events to the existing Glob PostToolUse shape and reuse postGlob indexed file summary enrichment.
• Preserve existing grep-family and source-read normalization behavior.
• Keep Codex soft-only: only emit hookSpecificOutput.additionalContext; no deny, suppress, or input rewrite.

Design notes

• This is intentionally limited to BashActionFindName from the existing Bash classifier.
• Bash stdout is passed through unchanged as tool_response; postGlob already handles newline-separated file lists.
• Non-classified file-list commands such as ls, fd, tree, and git ls-files remain silent.
• Claude, Gemini, and Antigravity hook behavior remains unchanged.

Out of scope

• ls / fd / tree / git ls-files
• sed / awk
• general Bash stdout enrichment
• apply_patch
• MCP tool-name matching
• deny / enforcement behavior
• input rewrite
• output suppression
• resolver / indexer / daemon / graph / MCP tool changes

Tests

• go test ./internal/hooks
• go test ./internal/agents/codex
• go test ./cmd/gortex
• git diff --check
• Added regression coverage that sed / awk source reads remain silent.