Dead files and broken test:cli / test:version scripts

[dickhardt]

• Dead files (knip, verified by grep — nothing imports or invokes them): src/legal_generator.js, test-mcp-stdio.js, test-svg-upload.js, test/integration.test.js, test/test-runner.js. test/integration/http.test.js is a 1-byte empty file.
• test/cli.test.js and test/version.test.js spawn bin/cli.js, which does not exist. npm run test:cli / npm run test:version fail on main today (0/4); they are not part of npm test. Delete the tests and scripts, or add the CLI.
• Unused exports (knip) in src/config.js, src/log.js, src/jwt-validation.js (jwtValidationMiddleware is an Express-style leftover that logs its own deprecation), src/utils.js.
• scripts/test-integration-mocha.sh waits a fixed 3 s after docker compose up -d; a run right after a previous one can fail 27 tests until the old compose is torn down.

Found during the Node 24 / dependency upgrade, 2026-09-06 (see chore/deps-prune branch)