fix(#3547): exercise the real global config-home shape in the install harness (#3567)

* test(#3547): failing-first regression for collapsed global install shape

* fix(#3547): exercise the real global config-home shape in the install harness

* test(#3547): align ripple suites with the real global install shape

* test(#3547): update stale collapsed-shape pins in provenance and migration suites

* fix(#3547): bump emitted-baseline schema version for the real install shape

---------

Co-authored-by: sim <sim@local>

tests/fixtures/install-tree/opencode.json

@@ -1,6 +1,5 @@
 [
   ".gsd-profile",
-  ".gsd/defaults.json",
   "agents/gsd-advisor-researcher.md",
   "agents/gsd-ai-researcher.md",
   "agents/gsd-assumptions-analyzer.md",