fix: add missing MIT license headers from reviewed PRs #590

Follow-up: MIT license headers missing from merged PRs

After reviewing all open PRs, these files were identified as missing the required MIT license header. Fix needed after the parent PRs merge.

Files to fix (by parent PR)

PR #550 (CORS allowlist):

• packages/agent-os/extensions/copilot/src/tests/cors-config.test.ts
• packages/agent-os/extensions/copilot/src/tests/cors.test.ts
• packages/agent-os/extensions/copilot/jest.config.cjs

PR #551 (harden endpoints):

• packages/agent-os/extensions/copilot/jest.config.cjs

PR #554 (colored terminal output):

• packages/agent-os/tests/test_cli_output.py

PR #560 (webhook payload size limit):

• packages/agent-os/extensions/copilot/jest.config.js
• packages/agent-os/extensions/copilot/src/index.test.ts

PR #565 (langchain scope chain):

• scripts/docker/dev-entrypoint.sh
• scripts/docker/run-tests.sh

Additional fix needed

PR #551: Move zod from devDependencies to dependencies (runtime usage in validation.ts)

PR #418: Fix duplicate task categorization in trust_cli.py (successful_tasks and failure_tasks populated twice)

Expected header

Python/Shell: # Copyright (c) Microsoft Corporation. / # Licensed under the MIT License.
TS/JS: // Copyright (c) Microsoft Corporation. / // Licensed under the MIT License.