Rewrote looksLikeMap from 6 layered heuristics down to 3 simple rules:
1. All numeric keys → map (certain)
2. Any key composed of words → struct (certain)
3. Everything else → map (safe default)
The asymmetry is deliberate: a map misidentified as a struct explodes
into hundreds of fields, while a struct misidentified as a map is
compact and easy to fix.
Word detection splits keys on _ and camelCase, checks segments for
pronounceability (vowel/consonant rhythm). Short words (id, at, on)
only count when paired with a strong 3+ char word.
Also adds raw path type naming with Item suffix for collections
(FriendsItem instead of Friend), real API test fixtures from PokeAPI
and SWAPI, and UUID-based test data replacing synthetic abc123 keys.
RawPaths walks JSON depth-first and emits flat paths with monotonically
numbered type names (Root0, People2, etc.). Each type intro immediately
precedes its fields, making the output streamable and order-stable.
Also improves map detection heuristics:
- All-numeric keys are always maps (even with 1-2 keys)
- Keys containing digits detected as IDs (e.g., emp_101)
- New isKnownFieldName with broad list of common field names
(timestamps, flags, relations, etc.) as strong struct signal
