refactor(search): remove NLP/smart-search feature entirely (#772)

## Summary

- Removes the NLP/smart-search feature completely — the feature was too unreliable and slow; users get better results with the regular search filters
- Deletes the entire backend `search/` package (NlSearchController, NlQueryParserService, NlpClient, NlSearchRateLimiter — 14 classes + 6 test classes)
- Deletes the `nlp-service/` Python microservice (FastAPI, rapidfuzz, DB-backed person matching)
- Removes all frontend NL search components: SmartModeToggle, SmartSearchStatus, InterpretationChipRow, DisambiguationPicker, chip-types, theme-chip-removal
- Strips smart-mode logic from SearchFilterBar and documents/+page.svelte
- Removes `SMART_SEARCH_UNAVAILABLE` / `SMART_SEARCH_RATE_LIMITED` error codes from backend, frontend types, and all three i18n files (de/en/es)
- Removes `nlp-service` container and `APP_NLP_BASE_URL` from both docker-compose files
- Removes Ollama/NLP Prometheus scrape job and Grafana dashboard
- Deletes ADRs 028 (×2), 034, 035

## Test plan

- [ ] Backend compiles: `cd backend && ./mvnw compile -q` → BUILD SUCCESS
- [ ] Frontend server tests pass: `cd frontend && npm run test -- --project=server`
- [ ] No NLP/smart-search references remain in source: `grep -r "SmartSearch\|NlSearch\|nlp-service\|SMART_SEARCH" backend/src frontend/src`
- [ ] `docker compose config` validates both compose files
- [ ] Search page loads, filter bar works, no smart-mode toggle visible

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Marcel <marcel@familienarchiv>
Reviewed-on: #772

docker-compose.prod.yml

@@ -50,7 +50,6 @@ volumes:
   minio-data:
   ocr-models:
   ocr-cache:
-  ollama-models:
 
 services:
   db:
@@ -201,73 +200,6 @@ services:
     security_opt:
       - no-new-privileges:true
 
-  # --- Ollama: Model init (one-shot pull) ---
-  # Pulls qwen2.5:7b-instruct-q4_K_M (~4.7 GB) into the ollama-models volume on
-  # first start; exits quickly on subsequent starts (model already cached).
-  # The ollama/ollama image's ENTRYPOINT is `ollama` and the image ships WITHOUT
-  # curl, so the entrypoint is overridden to a shell and readiness is probed with
-  # `ollama list` (not curl). The pull is guarded by a `grep` on the cached model
-  # list so a model already on the volume exits clean WITHOUT a registry round-trip
-  # — a host reboot during a registry/network blip can no longer fail init (which
-  # would block the ollama service via service_completed_successfully).
-  # Backend degrades gracefully (503) if Ollama is absent.
-  ollama-model-init:
-    image: ollama/ollama:0.30.6
-    restart: "no"
-    entrypoint: ["/bin/sh", "-c"]
-    command:
-      - "ollama serve & until ollama list >/dev/null 2>&1; do sleep 1; done && (ollama list | grep -q 'qwen2.5:7b-instruct-q4_K_M' || ollama pull qwen2.5:7b-instruct-q4_K_M)"
-    networks:
-      - archiv-net
-    volumes:
-      - ollama-models:/root/.ollama
-    mem_limit: 2g
-    read_only: true
-    tmpfs:
-      - /tmp:size=512m
-    cap_drop:
-      - ALL
-    security_opt:
-      - no-new-privileges:true
-
-  # --- Ollama: LLM inference server ---
-  # Serves the pre-pulled model for NL search inference. Backend reaches it at
-  # http://ollama:11434 (application.yaml default; no env override required).
-  # Healthcheck uses `ollama list` because the image has no curl.
-  ollama:
-    image: ollama/ollama:0.30.6
-    restart: unless-stopped
-    expose:
-      - "11434"
-    networks:
-      - archiv-net
-    volumes:
-      - ollama-models:/root/.ollama
-    environment:
-      # Pin the model in memory (no idle unload). Without this, Ollama evicts
-      # the model after ~5 min idle and the next query pays a cold-load penalty
-      # that exceeds the backend read timeout → NL search 503 after idle.
-      OLLAMA_KEEP_ALIVE: "-1"
-    cpus: "${OLLAMA_CPU_LIMIT:-4.0}"
-    mem_limit: "${OLLAMA_MEM_LIMIT:-8g}"
-    memswap_limit: "${OLLAMA_MEM_LIMIT:-8g}"
-    read_only: true
-    tmpfs:
-      - /tmp:size=512m
-    cap_drop:
-      - ALL
-    security_opt:
-      - no-new-privileges:true
-    healthcheck:
-      test: ["CMD", "ollama", "list"]
-      interval: 30s
-      timeout: 10s
-      retries: 5
-      start_period: 60s
-    depends_on:
-      ollama-model-init:
-        condition: service_completed_successfully
-
   backend:
     image: familienarchiv/backend:${TAG:-nightly}
     build: