initialize vitest and add E2E tests for public API endpoints

[Enes830]

Greptile Overview

Greptile Summary

Initialized vitest and added comprehensive E2E tests for all public API endpoints including Namespace, Ingest Jobs, Documents, Search, Uploads, Hosting, and Warm-up APIs.

Key Changes:

• Set up vitest with proper configuration for E2E testing
• Created reusable test setup with Zod schema validation for response types
• Implemented 250+ test cases covering happy paths, auth errors, validation errors, and edge cases
• Added detailed documentation (README and BUGS.md) for running tests and tracking known issues
• Used environment variables for configuration flexibility

Test Coverage:

• Health, Namespace, Ingest Jobs (TEXT/FILE/CRAWL), Documents, Search, Uploads, Hosting, Warm-up APIs
• Auth validation (401 errors)
• Input validation (400/422 errors)
• Not found errors (404)
• Conflict errors (409)

Notable Aspects:

• Tests appropriately skip operations that would delete test data
• Three tests are skipped due to documented API bugs
• BUGS.md provides excellent documentation of known issues with root causes and fix suggestions

Confidence Score: 5/5

• This PR is safe to merge - it only adds test infrastructure and documentation without modifying production code
• The PR exclusively adds testing infrastructure with well-structured E2E tests, clear documentation, and no changes to production code. Tests follow best practices with schema validation, proper error handling, and environment-based configuration.
• No files require special attention - all test files are well-structured and properly documented

Important Files Changed

Filename	Overview
apps/web/test/e2e/setup.ts	Created comprehensive test setup with schemas, helpers, and environment config; includes z.iso.datetime() which may need verification
apps/web/test/e2e/namespace.test.ts	Comprehensive namespace API tests covering CRUD operations, auth, and validation; includes one skipped test due to known bug
apps/web/test/e2e/ingest-jobs.test.ts	Thorough ingest jobs API tests covering TEXT, FILE, and CRAWL types with proper error handling
apps/web/test/e2e/hosting.test.ts	Hosting API tests with two skipped tests due to known bugs in PATCH and DELETE endpoints
apps/web/test/e2e/BUGS.md	Comprehensive documentation of known bugs blocking tests with root causes and fix options

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