feat: add source-grounded evolution and Ollama assistant

backend/README.md

@@ -1065,7 +1065,8 @@ docker exec geointel python /app/scripts/provision_regional_timeseries.py
 ```
 
 This resolves the retained official boundary and imports five Statbel
-population snapshots plus five modern forest snapshots into
+population snapshots plus five modern forest, water, built-function and
+transport-infrastructure snapshots into
 `Kempen Regional Workbench`. Mol and regional series keys remain separate and
 existing immutable datasets are reused. Complete statistical sectors use exact
 published totals; a rectangle cutting a sector remains an area-weighted
@@ -1084,6 +1085,30 @@ only for matching Dataset/Area ids with explicit clipping metadata or a known
 clipping operator; drawn rectangles and ordinary uploads keep the normal exact
 PostGIS intersection path.
 
+## Local Ollama GIS assistant
+
+The optional assistant is a read-only backend integration. It lists locally
+installed Ollama models, calculates the active Area/bbox metrics from persisted
+PostGIS features and sends only that compact JSON context to Ollama. It never
+downloads models, sends geometries or treats model prose as source data.
+
+Configuration:
+
+```text
+OLLAMA_ENABLED=true
+OLLAMA_BASE_URL=http://host.docker.internal:11434
+OLLAMA_DEFAULT_MODEL=qwen3.5:9b
+OLLAMA_TIMEOUT_SECONDS=120
+OLLAMA_MAX_OUTPUT_TOKENS=700
+```
+
+The Unraid deployment adds `host.docker.internal:host-gateway` automatically.
+Verify the connection with `GET /api/v1/assistant/status`, inspect installed
+models with `GET /api/v1/assistant/models` and ask a grounded question through
+`POST /api/v1/projects/{project_id}/assistant/query`. A requested model must be
+present in Ollama `/api/tags`. Missing water depth/bathymetry remains explicit;
+the assistant cannot turn 2D water geometry into volume.
+
 ## Helpful repository scripts
 
 - `bash scripts/backend_install.sh`