AIReceiptParser now routes to tool-aware or standard vision clients.
Tool-capable models (OpenAI, Claude, LlamaCpp) call search_categories,
search_transactions, and search_merchants during parsing. Ollama gets
pre-fetched DB context injected into the prompt. Adds suggestedCategory
and suggestedTransactionId fields with AI-driven transaction mapping.
Includes NullableLongConverter for resilient JSON deserialization and
restructured receipt prompt with strict field types.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>