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>

deploy/docker/searxng/settings.yml

@@ -0,0 +1,9 @@
+# GooSeek — SearXNG для внутреннего использования (search-svc)
+# https://docs.searxng.org/admin/settings/
+use_default_settings: true
+search:
+  formats: [html, json, csv, rss]
+server:
+  secret_key: "gooseek-searxng-internal"
+  limiter: false
+  image_proxy: true