Project active overlay edges as logical graph edges instead of per-file overlay ownership rows. Cross-file edges can be owned by multiple changed files in one overlay generation for cleanup and compaction bookkeeping, but AI-facing active views must not inflate degree or schema counts.
Mirror the production active-edge semantics in the self-dogfood benchmark and add a store regression for duplicate cross-file overlay edge ownership.
Validation: CBM_ONLY_SUITE=store_nodes build/c/test-runner; make -f Makefile.cbm cbm; self-dogfood full matrix at /private/tmp/cbm-overlay-active-edge-dedupe-full-self-dogfood-20260704T.json; source-safety at /private/tmp/cbm-overlay-active-edge-dedupe-source-safety-20260704T.log.
Signed-off-by: Andrew Hundt <ATHundt@gmail.com>
Andrew Hundt
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