docs(conformance): record cachekit-py's path-encoding 1.2.0 and freshness-headers 1.0.0 copies (LAB-8254)

changelog.d/20261005_lab-8254.md

@@ -0,0 +1,16 @@
+### Feature matrix and conformance — cachekit-py vendors `path-encoding.json` 1.2.0 and `freshness-headers.json` 1.0.0 (LAB-8254)
+
+- `conformance/sdks.json` reads cachekit-py at `ce427a2`, the merge of
+  [cachekit-py#522](https://github.com/cachekit-io/cachekit-py/pull/522), and records its
+  byte-identical copies of `path-encoding.json` 1.2.0 and `freshness-headers.json` 1.0.0.
+  `conformance/coverage.md` is regenerated: API-4 to API-7, API-17, API-18, API-30, API-33,
+  API-34 and API-57 now read `partial (gap)` for cachekit-py, which means its copies hold
+  every vector those ids map to and only the recorded gap remains.
+- The **Test vectors in CI** row's cachekit-py cell lists both fixtures, vendored byte for
+  byte (sha256-pinned) and CI-executed in cachekit-py#522, unreleased. Note ¹⁶ now says
+  all three SDKs vendor this repo's current `path-encoding.json` and `freshness-headers.json`.
+- The same cell dated `interop-mode.json` 1.2.0
+  ([cachekit-py#391](https://github.com/cachekit-io/cachekit-py/pull/391)) and
+  `path-encoding.json` 1.1.0
+  ([cachekit-py#397](https://github.com/cachekit-io/cachekit-py/pull/397)) as unreleased. Both
+  have shipped since PyPI 0.21.0, and the cell now says so.