* fix(db): guard synthesis metadata and migrate the expression index
Bisect identifies 2a2f71ec (#2033) as the malformed JSON regression. Guard index expressions, ownership predicates, wiring lookups, and the legacy Go backfill; schema v11 replaces existing v10 indexes. Cover malformed base edges, staged publication, upgrade replay, and indexed range lookup.
* fix(db): preserve call precedence in deterministic edge traversal
Independent bisect identifies 2a2f71ec (#2033): source-first ordering puts importing file IDs ahead of function callers and consumes the default caller limit. Restore kind-first incoming and outgoing traversal with deterministic endpoint/position ties. Keep both original regression tests unchanged and cover filtered, cached, and provenance-filtered queries across reverse insertion order.
Validation: 25 test files passed (564 tests, 3 skipped), including security, MCP caller truncation, sync, migration, graph, and DB/query coverage; npx tsc --noEmit passed. Both bisects rebuilt tsc and copied assets at every step with CODEGRAPH_KERNEL=0 to avoid using the HEAD kernel on historical extraction code. Final validation used the normal kernel setting.
* chore: no changelog entry for an unreleased regression
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
