Deploy: migrate k3s → Docker; search logic → master-agents-svc

- deploy/k3s удалён, deploy/docker добавлен (Caddyfile, docker-compose, searxng)
- chat-svc: agents/models/prompts удалены, использует llm-svc (LLMClient, EmbeddingClient)
- master-agents-svc: SearchOrchestrator, classifier, researcher, actions, widgets
- web-svc: ChatModelSelector, Optimization, Sources удалены; InputBarPlus; UnregisterSW
- geo-device-svc, localization-svc: Dockerfiles
- docs: 02-k3s-services-spec.md, RUNBOOK/TELEMETRY/WORKING удалены

Co-authored-by: Cursor <cursoragent@cursor.com>

services/llm-svc/Dockerfile

@@ -1,7 +1,9 @@
+# syntax=docker/dockerfile:1
 FROM node:20-alpine AS builder
 WORKDIR /app
 COPY package*.json ./
-RUN npm install
+RUN --mount=type=cache,target=/root/.npm \
+    npm install
 COPY tsconfig.json ./
 COPY src ./src
 RUN npm run build
@@ -9,7 +11,8 @@ RUN npm run build
 FROM node:20-alpine
 WORKDIR /app
 COPY package*.json ./
-RUN npm install --omit=dev
+RUN --mount=type=cache,target=/root/.npm \
+    npm install --omit=dev
 COPY --from=builder /app/dist ./dist
 EXPOSE 3020
 ENV DATA_DIR=/app/data