Remove orientation_tagger completely from codebase

[spacegoatai]

Background

The orientation tagger doesn't work well and is redundant since:

1. WD-14 already provides some orientation detection
2. Both will likely be superseded by a Vision Language Model (VLM) in the future

Current State

• Orientation tagger was already removed from the detection pipeline config
• But the code and model references still exist throughout the codebase

Proposed Change

Completely remove all orientation tagger code and references:

Files to Update

• kalliste/taggers/orientation_tagger.py - Delete this file
• kalliste/taggers/tagger_pipeline.py - Remove orientation from TAGGER_CLASSES and related methods
• kalliste/config.py - Remove orientation model configuration
• kalliste/model/model_download_manager.py - Remove orientation model download
• kalliste/model/model_registry.py - Remove orientation model initialization methods
• kalliste/default_detection_config.yaml - Remove orientation tagger config section
• Update any tests that reference orientation tagger

Benefits

• Cleaner codebase
• Faster startup (one less model to download/initialize)
• Reduced maintenance burden
• WD-14 already provides orientation-related tags