CommonJS model: commonJsEvidenceFiles cuts off at 8 files visited while forwardsOutside reads to depth 8 #41

Found in the round-1 review of branch fix/commonjs-model-gaps (stacked on PR #29). This is a hypothesis; no edge difference has been shown.

commonJsEvidenceFiles still stops at seen.size >= 8, while forwardsOutside now cuts off on path depth (8) after #32. For a chain of exactly 8 forwarding hops, the forward check reads the 9th file, but that file is missing from typeFrom (import-resolver.ts, the commonJs typeFrom branch). That can leave a dependency the incremental sync does not track.

Fix direction: use the same depth cutoff in both.