fix(discover): exclude hook-rewritten commands from missed savings (#1055)

[ousamabenyounes]

Summary

Fixes #1055

• When the Ora Studio PreToolUse hook is active, rtk discover was reporting hook-rewritten commands (e.g. git diff, cargo test) as "missed savings" — even though the hook was already rewriting them to rtk git diff, rtk cargo test, etc.
• Root cause: the JSONL session log records the pre-rewrite command; discover saw git diff and classified it as Supported (missed).
• Fix: before the scan loop, detect hook status via hook_check::status(); when active, test each Supported command with rewrite_command(). If the hook would rewrite it, count it as hook_rewritten (excluded from missed-savings) and show a Hook-handled: N commands line in the output.

Test plan

• cargo fmt --all && cargo clippy --all-targets && cargo test
• 4 new tests: test_supported_git_commands_are_rewriteable_by_hook, test_supported_cargo_commands_are_rewriteable_by_hook, test_hook_rewritten_count_shown_when_nonzero, test_hook_rewritten_count_hidden_when_zero
• 1377 pass, 0 regressions (baseline: 1373)
• Manual: rtk discover output now shows "Hook-handled: N commands" instead of listing them as missed savings when the hook is installed

Files changed

File	Change
src/discover/mod.rs	detect hook status; route hook-rewritten commands to new counter
src/discover/report.rs	add hook_rewritten_count/hook_rewritten_tokens to DiscoverReport; show in text output
src/discover/registry.rs	2 regression tests verifying rewriteable-by-hook invariant
CHANGELOG.md	entry under [Unreleased]

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Vibe coded by ousamabenyounes

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Vibe Coded by Ousama Ben Younes
Developed With Ora Studio (Claude Code)

[pszymkowiak]

[w] wshm · Automated triage by AI

📊 Automated PR Analysis

🐛 Type	bug-fix
🟡 Risk	medium

Summary

Fixes the discover command incorrectly reporting hook-rewritten commands (e.g. git diff, cargo test) as 'missed savings' when the Claude Code PreToolUse hook is active. The fix detects hook status before scanning, routes hook-handled commands to a separate counter, and displays them as 'Hook-handled' in output. Also fixes git log --format output truncation that was corrupting programmatic output like SHAs.

Review Checklist

• Tests present
• Breaking change
• Docs updated

Linked issues: #1055

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Analyzed automatically by wshm · This is an automated analysis, not a human review.