chore(compat): survey CC 2.1.133-2.1.146; track SchemaStore PR #5706

[tigers1997]

Summary

• Resurveyed CC CHANGELOG 2.1.133–2.1.146 and the SchemaStore catalog after a 9-day gap; original gating PR #5665 was closed 2026-05-19 as superseded by #5706 (sync to v2.1.143).
• Refreshed the CLAUDE_CODE_COMPAT rationale comment in config_schema.py to capture the resurvey window and note what's gated on #5706 vs. what needs a future sync.
• Added the resurvey entry to CHANGELOG.md under ## Unreleased.

What's in #5706 (eleven keys + five env vars unblock on merge)

Live-verified against the PR's head-branch schema 2026-05-21:

• skillOverrides (CC 2.1.129) — off / user-invocable-only / name-only
• worktree.baseRef (CC 2.1.133) — fresh / head
• worktree.bgIsolation (CC 2.1.143) — worktree / none
• autoMode.hard_deny (CC 2.1.136)
• sandbox.failIfUnavailable
• subagentStatusLine top-level — {type, command}
• statusLine.hideVimModeIndicator
• Hook args: string[] exec form (CC 2.1.139)
• Hook continueOnBlock: boolean for prompt hookCommand (CC 2.1.139)
• Env: ANTHROPIC_WORKSPACE_ID, CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE, CLAUDE_CODE_PLUGIN_PREFER_HTTPS, CLAUDE_CODE_POWERSHELL_RESPECT_EXECUTION_POLICY, CLAUDE_CODE_STOP_HOOK_BLOCK_CAP

Still held for a future sync PR

• Hook output terminalSequence field (CC 2.1.141) — NOT in #5706
• Stop/SubagentStop hook input adds background_tasks + session_crons (CC 2.1.145) — NOT in #5706

What this PR does NOT do

• No tested_up_to bump (still 2.1.132). Deferred to the post-#5706 unblock batch per the "no lone tracking bumps" rule.
• No template changes. No new keys added to any shipped settings template until they're schema-validated.
• No README change. The silent-drop list at README.md:14 describes the min_version floor (still 2.1.116), which doesn't move.

No live breakage

/simplify was renamed to /code-review in CC 2.1.146 — configurator ships /review (slash command) + code-reviewer (agent name), so no collision.

Test plan

• python3 -c 'import config_schema; print(config_schema.CLAUDE_CODE_COMPAT)' parses + imports cleanly (verified locally — comment-only change)
• CI: make test / configurator self-check pipeline passes (covered by branch CI)
• No-op for end users: existing tested_up_to warning behavior unchanged for any installed CC version

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