chore(scalar-arrays): declare incidental extension-upgrade diff for PR #870

The PR touches one packages/3-extensions/ test file (threading the now-
required capabilities matrix into a test ContractSourceContext), which trips
the check:upgrade-coverage per-pr-declaration gate. Record it as an incidental
substrate diff: the affected types are framework-internal contract-emission
seams the control stack always populates; no extension-author API changed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Serhii Tatarintsev <tatarintsev@prisma.io>

Author: SevInf

skills/extension-author/prisma-next-extension-upgrade/upgrades/0.14-to-0.15/instructions.md

@@ -126,3 +126,19 @@ additive members — `raw` (MongoRawClient) and `execute<Row>(plan)` (direct que
 execution without going through `runtime()`). Both additive; existing extension code
 is unaffected. No extension-author action required. Incidental substrate diff only.
 -->
+
+<!--
+TML-2912 (PSL native scalar lists, end-to-end): PSL now lowers scalar-list fields
+(`String[]`, `Int[]`, …) to native array storage columns instead of the JSONB
+fallback, gated on the adapter-reported `scalarList` capability. The review-round
+follow-up also makes the adapter capability matrix required end-to-end on the
+contract-source seam — `ContractSourceContext.capabilities`,
+`InterpretPslDocumentToSqlContractInput`, and the SQL PSL resolution inputs are no
+longer optional. These are framework-internal contract-emission types that the
+control stack always populates; extension authors do not construct them. The only
+`packages/3-extensions/` touch is a one-line test-context update in
+`postgres/test/psl-namespace-qualifier-routing.test.ts` (threading the now-required
+`capabilities` field). No extension-author API changed — re-emit absorbs the
+scalar-list contract shape. No extension-author action required. Incidental
+substrate diff only.
+-->