#1748: normalize the sqlite fast path's "?" COALESCE placeholder (and None)
back to "unknown" inside _sqlite_taxonomy, so drawers missing wing/room
metadata keep the client path's output contract — no observable API change
for MCP clients on legacy/partial drawers.
#1068: invoke the parent embedder build via super().model instead of reaching
into cached_property's .func attribute, so the uncapped/fallback path survives
chromadb changing `model` to a plain @property or other descriptor.
ChromaDB's ONNX embedder builds its InferenceSession without a thread cap, so
ORT's intra-op pool defaults to the physical core count. OMP_NUM_THREADS is
inert against it (ORT owns its own pool), so a background `mempalace mine`
pins 4-5 cores and stacked Stop-hook fires turn the machine into a thermal
event.
Add an `embedding_threads` config knob (env MEMPALACE_EMBEDDING_THREADS or
config.json). Unset/"auto" caps the intra-op pool at half the logical CPUs so
a fresh install stays usable out of the box; a positive integer sets an exact
count; 0/negative leaves ORT uncapped for users who want max throughput.
The cap is applied via SessionOptions at session construction:
- `_MempalaceONNX` (default minilm) overrides the `model` cached_property to
rebuild the session the same way upstream does plus the cap, falling back to
upstream's uncapped build if chromadb internals shift.
- `EmbeddinggemmaONNX` builds its session through the shared
`_intra_op_session_options()` helper.
Igor Lins e Silva
copilot-swe-agent[bot]