image inspect output is not Docker-compatible

[jahirvidrio]

mocker image inspect and mocker inspect --type=image produce different output formats (they should be identical, as they are in Docker), and neither is Docker-compatible.

Version: Mocker v0.3.2

Root Cause

Data layer:

• ImageInfo model only has 6 fields (id, repository, tag, labels, size, created)
• ImageManager.toImageInfo() stubs size: 0 and created: Date() instead of reading real metadata

Serialization layer:

• ImageInspect.swift builds its own JSONEncoder() (no array wrapping, no ISO8601)
• Inspect.swift uses TableFormatter.printJSONArray (array + ISO8601)
• No shared serializer (two commands diverge)