Builds a real, non-identity CGA motor from the value_axes directions
carried by an IdentityManifold. Each axis.direction is treated as a
3-vector in R^3, composed additively into a single translator, and
scaled by the axis's index to separate the directions in concept space.
This replaces the unconditional PersonaMotor.identity() call in
ChatRuntime with a motor that geometrically encodes CORE's character.
algebra/rotor.py and persona/motor.py were calling normalize_to_versor()
which is the gate-only injection primitive. Both are construction-time
sites (building rotors and motors from raw arrays), so the correct call
is unitize_versor().
Also tightens TestINV02 to scan for normalize_to_versor violations only —
unitize_versor has its own legitimate call sites and is not under the
same single-site restriction. Adds a new TestINV02b that verifies
unitize_versor is NOT called inside propagation, generation, or vault
recall paths.
Fixes: INV-02 architectural invariant test failure.
