feat: implement create-chat-conversation function with OpenAI integration and Supabase support

- Added CORS handling for the create-chat-conversation function.
- Implemented health check endpoint for the function.
- Created endpoints for managing conversations and messages with OpenAI.
- Added error handling and response formatting for better API usability.
- Introduced utility functions for environment variable management and Supabase client creation.
- Enhanced schema handling for structured responses from OpenAI.
- Implemented conversation archiving and retrieval logic.

supabase/functions/create-chat-conversation/lib/plan.ts

@@ -0,0 +1,57 @@
+import { HttpError } from "./errors.ts";
+
+export function pickSchemaFields(
+  definicion: any,
+  campos?: string[],
+) {
+  if (!definicion || definicion.type !== "object" || !definicion.properties) {
+    return definicion;
+  }
+
+  const extra = {
+    properties: {
+      "ai-message": {
+        type: "string",
+        description:
+          "Mensaje breve para el usuario final confirmando qué se mejoró y qué se hizo.",
+        examples: [
+          "Listo: mejoré la redacción del perfil de ingreso y propuse un tema de investigación alineado al plan.",
+        ],
+      },
+    },
+  };
+
+  let out = structuredClone(definicion);
+
+  // Si piden campos, filtramos propiedades/required a esos campos
+  if (Array.isArray(campos) && campos.length > 0) {
+    const entries = Object.entries(out.properties).filter(([k]) =>
+      campos.includes(k)
+    );
+    out.properties = Object.fromEntries(entries);
+    if (Array.isArray(out.required)) {
+      out.required = out.required.filter((k: string) => campos.includes(k));
+    }
+  }
+
+  // Siempre agregamos ai-message
+  out.properties = { ...out.properties, ...extra.properties };
+  out.required = Array.isArray(out.required)
+    ? [...new Set([...out.required, ...Object.keys(extra.properties)])]
+    : Object.keys(extra.properties);
+
+  return out;
+}
+
+export function safePlanForPrompt(plan: any) {
+  const copy = structuredClone(plan);
+  if (copy?.estructuras_plan) delete copy.estructuras_plan;
+  return copy;
+}
+
+export function assertUuid(v: string, name: string) {
+  // validación ligera
+  if (!v || typeof v !== "string" || v.length < 10) {
+    throw new HttpError(400, "bad_input", `Invalid ${name}`);
+  }
+}