add nocmem: auto memory recall + ingest via NuoNuo hippocampal network

- nocmem Python service (mem/): FastAPI wrapper around NuoNuo's
  Hopfield-Hebbian memory, with /recall, /ingest, /store, /stats endpoints
- NOC integration: auto recall after user message (injected as system msg),
  async ingest after LLM response (fire-and-forget)
- Recall: cosine pre-filter (threshold 0.35) + Hopfield attention (β=32),
  top_k=3, KV-cache friendly (appended after user msg, not in system prompt)
- Ingest: LLM extraction + paraphrase augmentation, heuristic fallback
- Wired into main.rs, life.rs (agent done), http.rs (api chat)
- Config: optional `nocmem.endpoint` in config.yaml
- Includes benchmarks: LongMemEval (R@5=94.0%), efficiency, noise vs scale
- Design doc: doc/nocmem.md

mem/nocmem.service

@@ -0,0 +1,19 @@
+[Unit]
+Description=nocmem — NuoNuo memory service for NOC
+After=network.target
+
+[Service]
+Type=simple
+WorkingDirectory=/data/src/noc/mem
+ExecStart=/home/fam/.local/bin/uv run uvicorn server:app --host 0.0.0.0 --port 9820
+Restart=on-failure
+RestartSec=5
+
+Environment=NOCMEM_LLM_ENDPOINT=http://100.84.7.49:8000/v1
+Environment=NOCMEM_LLM_MODEL=QuantTrio/gemma-4-31B-it-AWQ
+Environment=NOCMEM_LLM_API_KEY=unused
+Environment=NOCMEM_DATA_DIR=/data/src/noc/mem/data
+Environment=NOCMEM_DEVICE=cuda
+
+[Install]
+WantedBy=default.target