Use official ollama npm client for all LLM calls

Replaces hand-rolled fetch to /api/chat with the ollama@0.6.3 package.

The package supplies proper Accept/Content-Type/User-Agent headers and

auto-handles the Ollama protocol, fixing the CDN 403s Node's bare fetch

gets against ollama.com during filing.

Both organize and search LLM ranking now route through controller/ollama.js.

Signed-off-by: William Mantly <wmantly@gmail.com>

package.json

@@ -23,6 +23,7 @@
     "lru-native2": "^1.2.6",
     "moment": "^2.30.1",
     "mustache": "^4.2.0",
+    "ollama": "^0.6.3",
     "p2psub": "^0.1.9",
     "sequelize": "^6.35.2",
     "sequelize-cli": "^6.6.2",