[ImgBot] Optimize images

*Total -- 4,584.25kb -> 3,969.56kb (13.41%)

/openspec/changes/local-admin-onboarding/qa/screenshots/login-error-reduced.png -- 316.49kb -> 160.41kb (49.32%)
/docs/screenshots/run-operations.png -- 126.03kb -> 97.61kb (22.55%)
/openspec/changes/local-admin-onboarding/qa/screenshots/login-terminal-motion.png -- 784.36kb -> 631.50kb (19.49%)
/docs/screenshots/project-overview.png -- 143.17kb -> 116.90kb (18.35%)
/docs/screenshots/workflow-inspector.png -- 153.03kb -> 129.11kb (15.63%)
/docs/screenshots/evidence-relationships.png -- 224.80kb -> 189.83kb (15.56%)
/openspec/changes/local-admin-onboarding/qa/screenshots/login-mobile-motion.png -- 157.75kb -> 133.99kb (15.06%)
/openspec/changes/local-admin-onboarding/qa/screenshots/login-fluid-motion.png -- 1,347.00kb -> 1,249.46kb (7.24%)
/openspec/changes/local-admin-onboarding/qa/screenshots/login-pixel-motion.png -- 976.39kb -> 912.56kb (6.54%)
/chrome-extra/tampermonkey/images/icon128.png -- 2.70kb -> 2.55kb (5.36%)
/chrome-extra/tampermonkey/images/icon_grey38.png -- 1.04kb -> 0.99kb (5.15%)
/chrome-extra/tampermonkey/images/txt.png -- 16.54kb -> 16.19kb (2.14%)
/docs/screenshots/record-detail.png -- 323.19kb -> 316.83kb (1.97%)
/chrome-extra/tampermonkey/images/icon_forbidden38.png -- 2.04kb -> 2.00kb (1.92%)
/frontend/public/provider-icons/kimi.svg -- 0.69kb -> 0.68kb (1.69%)
/chrome-extra/tampermonkey/images/icon_blocker32.png -- 1.62kb -> 1.60kb (1.27%)
/frontend/public/provider-icons/minimax.svg -- 1.53kb -> 1.51kb (1.15%)
/chrome-extra/tampermonkey/images/icon_grey32.png -- 0.88kb -> 0.87kb (1.11%)
/backend/workflow/fixtures/gaojixing_fixture_顶部.svg -- 0.12kb -> 0.12kb (0.83%)
/backend/workflow/fixtures/gaojixing_fixture_底部.svg -- 0.12kb -> 0.12kb (0.81%)
/backend/workflow/fixtures/gaojixing_fixture_正文.svg -- 0.12kb -> 0.12kb (0.81%)
/frontend/public/provider-icons/openrouter.svg -- 0.88kb -> 0.88kb (0.66%)
/chrome-extra/tampermonkey/images/icon_blocker38.png -- 2.08kb -> 2.07kb (0.61%)
/frontend/public/provider-icons/openai.svg -- 1.67kb -> 1.66kb (0.35%)

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