Deleted: the seven files whose subject was plugins/memory/hindsight itself
(provider, config schema, env perms, local-runtime hint, templates, health
grace timeout, root guard) and the hindsight-only cases inside the multiplex
identity-scope, provider-thread, BOM-tolerance and session-switch suites.
Retargeted: the dashboard memory-provider config-surface tests used hindsight
as the only bundled provider with a flat `<home>/<name>/config.json` declared
schema; they now install a synthetic user plugin (`flatprov`) into the isolated
HERMES_HOME so the generic declared/live PUT + GET paths stay covered. The
lazy_deps plugin-owned-range test keeps mem0ai as its subject.
090b06c345