Feature/add mis endpoints in monitoring

[bluepal-prasanthi-moparthi]

This PR includes the following Monitoring - related endpoints:

1. GET - /_admin/log/entries
2. DELETE - /_admin/log/level
3. GET - /_admin/log/structured
4. PUT - /_admin/log/structured
5. GET - /_db/{database-name}/_admin/server/api-calls
6. GET - /_db/{database-name}/_admin/metrics/v2

[Copilot]

Pull Request Overview

This PR adds several monitoring and administrative endpoints to the ArangoDB Go driver, enabling better observability and log management capabilities. The implementation includes comprehensive testing for all new endpoints and proper integration with existing client patterns.

• Adds 6 new admin/monitoring endpoints for log management, structured logging, API call tracking, and metrics collection
• Implements proper query parameter handling and validation for complex log filtering options
• Provides comprehensive test coverage for all new endpoints with version compatibility checks

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
v2/arangodb/client_admin.go	Defines interfaces and data structures for new monitoring endpoints
v2/arangodb/client_admin_log_impl.go	Implements the actual HTTP client methods for all new endpoints
v2/tests/admin_log_test.go	Adds comprehensive test coverage for all new endpoints
Makefile	Updates default ArangoDB Docker image to enterprise edition

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