Adds a numeric-metadata-preserved test (surviving specific edge keeps its own
weight/confidence, not the demoted generic's) and an unknown-relation test
(a non-denylisted relation is treated as specific in either arrival order, so
the denylist can't drift into an ordering). Dates 0.9.45, opens 0.9.46.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
When two edges connect the same (source, target) pair with different relations,
the simple-graph collapse was last-write-wins by alphabetical relation, so a
specific `calls` was systematically overwritten by a generic `references`/
`uses` — and `references` is not in the callflow filter, so those call sites
dropped out of the call graph. A generic relation can no longer clobber a
stored non-generic one; the outcome is now order-independent and the edge count
is unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
