2b8c3a4db4
Closes the item v1.8.6 (and v1.8.5 before it) listed as "Still open": the palace pin was a literal string in Dockerfile.base with zero references in docker-publish.yml, while PI_VERSION had a concreteness gate, a published-on-registry check and a never-silently-adopt drift warning. resolve-versions now applies all of those to MEMPALACE_VERSION, read from Dockerfile.base so a local `docker build` and CI install the same version by construction, plus one gate pi does not need: a YANKED release is refused, because an exact pin installs one silently under PEP 592 and would have shipped a withdrawn palace client to the whole fleet. smoke gains `installed mempalace matches CI's audited pin` via a new EXPECTED_MEMPALACE_VERSION threaded into both smoke jobs. It is not redundant with `manifest mempalace_version matches the installed core`: that compares two properties of one image and cannot notice that both are the wrong version. The case this covers is a variant built FROM a cached base carrying an older pin — internally consistent, silently stale. Mutation-tested by extracting the shipped block out of the YAML and stubbing curl: 9 cases covering every gate, then once end-to-end against live PyPI. That found a real defect in the first draft — the yank message inlined a jq program inside $(...) inside a double-quoted string, where the escaping broke the filter (jq compile error) while the surrounding `exit 1` still fired: a gate that looked correct and reported garbage. Note: correcting Dockerfile.base's now-false "known gap, carried forward" comment forces a base rebuild (~67 min) on the next tag. Leaving a comment asserting the audit does not exist was the worse option.