fix(ci): reduce naming audit baseline churn

[kubohiroya]

Summary

• remove naming-audit baseline JSON changes from normal PR full-scan triggers
• move baseline integrity/full-scan validation to a dedicated scheduled/manual workflow
• keep resolved baseline-only differences non-blocking in normal PR naming audit
• make affected validation tasks configurable, defaulting to typecheck/test

Fixes #1566

Verification

• pnpm install --frozen-lockfile
• git diff --check
• pnpm vitest run --config scripts/vitest.config.ts scripts/tests/requiresNamingAuditFullScan.test.ts scripts/tests/namingAuditCiUtils.unit.test.ts
• node --test scripts/ci/resolve-validation-mode.test.mjs
• node -e sanity checks for requiresNamingAuditFullScan and affected Turbo tasks

Notes

• A local full naming-audit scan was started because this PR changes naming-audit implementation/workflow behavior. It was intentionally stopped after proving too slow for the PR loop, matching the goal of ci(naming): reduce unnecessary full scans and baseline churn #1566 to move baseline full-scan work out of normal PR checks.