Bind SessionManager saves to the existing raw archive path so SDK imports and other bypass saves cannot persist more than the file cap without archiving unconsolidated overflow.
Add an SDK regression test that exercises the real ingest path.
Refs #4787
Keep only 128 recently used sessions strongly cached while retaining weak references to evicted sessions still owned by active callers. This bounds idle memory growth without allowing duplicate live Session objects or skipping shutdown flushes.
Add LRU, lifecycle, SDK, and flush regression coverage.
Refs #4786
KDBandXubin Ren
