- services/tools/journal.py — record_moment + search_journal tool handlers
- services/tools/_registry.py: add `journal` flag on ToolDef + tool() decorator
- get_tools_for_user(user_id, conversation_type='chat'|'journal') —
exclude journal-only tools from chat sessions; exclude set_rag_scope
from journal sessions
- services/tools/__init__.py: register the new journal module; drop the
unused get_briefing_tools export
- services/llm.py build_context: short-circuit for journal conversations,
using journal_pipeline.build_journal_system_prompt and skipping all
notes-RAG injection (preserves the journal/notes isolation invariant)
- services/generation_task.py: pass conversation_type into get_tools_for_user
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
