Make call_model pub(crate) so run_one_agent reads the model from the
.agent definition instead of hardcoding sonnet. Naming agent upgraded
from haiku to sonnet.
Add generalize agent: finds the largest prefix-grouped cluster of
nodes that hasn't been visited recently, wired into the agent cycle
between extractor and connector at depth 3. New "clusters" resolver
in defs.rs does prefix-based grouping with provenance filtering.
Any time an agent creates a new node (WRITE_NODE) or the fact miner
stores extracted facts, a naming sub-agent now checks for conflicts
and ensures the key is meaningful:
- find_conflicts() searches existing nodes via component matching
- Haiku LLM decides: CREATE (good name), RENAME (better name),
or MERGE_INTO (fold into existing node)
- WriteNode actions may be converted to Refine on MERGE_INTO
Also updates the rename agent to handle _facts-<UUID> nodes —
these are no longer skipped, and the prompt explains how to name
them based on their domain/claim content.
