chore: sync model pricing from OpenRouter API

providers/essentialai.toml

@@ -0,0 +1,18 @@
+# essentialai — auto-generated from OpenRouter API
+
+[provider]
+id = "essentialai"
+display_name = "Essentialai"
+api_key_env = "OPENROUTER_API_KEY"
+base_url = "https://openrouter.ai/api/v1"
+key_required = true
+
+[[models]]
+id = "rnj-1-instruct"
+display_name = "EssentialAI: Rnj 1 Instruct"
+tier = "fast"
+context_window = 32768
+max_output_tokens = 8192
+input_cost_per_m = 0.15
+output_cost_per_m = 0.15
+supports_streaming = true