v0.1.1

fix: load all custom categories from config and fix classification bugs

Three bugs prevented custom categories (e.g., interviews,
application_confirmations) from working:

1. load_config() only processed hardcoded category keys, silently
   dropping any custom categories added to the folders config
2. classify_email_vllm() excluded 'prompt_injection' (wrong key)
   instead of 'prompt_attack', leaking prompt injection detection
   text into classification prompts and confusing the LLM
3. main() crashed with KeyError when aggregating inbox stats that
   contained custom category keys not in the hardcoded total_stats dict

Fixes:

• load_config() now iterates over all folders keys in config
• classify_email_vllm() now excludes 'prompt_attack' correctly
• main() uses dict.get(key, 0) for safe stats aggregation

Add 13 regression tests in tests/test_custom_categories.py

v0.1.0

Initial release.