🐛 Keep the session-name assertion off the random profile root (#714) (#716)

`C4: one Session carries every turn, and --session names it` asserted that
the whole authorship directory path holds no "ada". The path's leaf is the
digest of the name and the assertion is about the leaf; the root above it is
a temporary directory named by a random hex UUID, which spells "ada" about
one run in a hundred — run 33574538193 drew `xmd-plan-profile-dada9d00-…`.
The assertion now reads the path relative to the root it was given.

Co-authored-by: Taras Mankovski <74687+taras@users.noreply.github.com>

Author: taras

packages/cli/tests/plan.test.ts

@@ -23,7 +23,7 @@ import { ensure, scoped, spawn, until } from "effection";
 import type { Operation } from "effection";
 import { ensureDir, readTextFile, rm, writeTextFile } from "@effectionx/fs";
 import { readdir } from "node:fs/promises";
-import { join, sep } from "node:path";
+import { join, relative, sep } from "node:path";
 import { API, stat } from "@executablemd/runtime";
 import { Elicitation } from "@executablemd/core";
 import type { ElicitationRequest } from "@executablemd/core";
@@ -419,9 +419,11 @@ describe(
         expect(namedDirectories[0]).toBe(namedDirectories[1]);
         expect(survived).toEqual([true, true]);
         // The name never reaches the path, and the digest is what the host
-        // derived from it.
+        // derived from it. Only the leaf is the host's to keep the name out of:
+        // the root above it carries a random hex UUID, which spells "ada" one
+        // run in a hundred or so.
         expect(namedDirectories[0]).toBe(authorshipDirectoryFor(authorshipRoot, "ada"));
-        expect(namedDirectories[0]).not.toContain("ada");
+        expect(relative(authorshipRoot, namedDirectories[0])).not.toContain("ada");
 
         // The second invocation continued the record the first established
         // rather than placing a second one: the store holds one, and only the