developer_vector_migrate: working connectivity, influence on proximity

Connectivity referenced undefined depth and attr variables and a
vector_attr channel that does not exist (the parm is vec_attr), so
selecting it failed the cook. Rewritten to match the float node: self
plus N rings, direction-weighted average, lerp by Influence, no debug
array attributes.

Proximity ignored Influence and wrote the neighbourhood average straight
into the attribute; it now lerps by Influence like the float node, skips
points with nothing in range, and no longer leaks an avg attribute.

Drops the dead second proximity wrangle behind a hard-wired switch and
the Reference parm only it used.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

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 1 file changed, 0 insertions(+), 0 deletions(-)

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