Add configurable Docker container log limits

[Dumbris]

Summary

Implements configurable Docker container log limits to prevent excessive disk usage from container stdout/stderr logs in isolated MCP servers.

• Adds LogDriver, LogMaxSize, LogMaxFiles configuration fields to both global and per-server isolation settings
• Default behavior uses Docker system default (no log driver override)
• When users explicitly configure json-file driver, applies log rotation limits (default: 100m max size, 3 max files)
• Supports server-specific overrides for fine-grained control

Changes

• Config: Add logging fields to DockerIsolationConfig and IsolationConfig
• Docker args: Conditionally add --log-driver and --log-opt arguments based on configuration
• Tests: Comprehensive test coverage for all configuration scenarios

Configuration Example

{
  "docker_isolation": {
    "log_driver": "json-file",
    "log_max_size": "50m",
    "log_max_files": "5"
  },
  "mcpServers": [{
    "name": "special-server", 
    "isolation": {
      "log_max_size": "25m",
      "log_max_files": "2"
    }
  }]
}

Test plan

• Unit tests pass for all configuration scenarios
• Default configuration uses Docker system defaults (no log args added)
• Explicit json-file configuration applies log limits correctly
• Server-specific overrides work as expected
• Non-json-file drivers don't get log options (as required by Docker)
• Build and linting passes