docs: update Cloudflare to Azion migration guide with revised installation commands and function signature details

Author: VitorAEltz

src/content/docs/en/pages/guides/cloudflare-to-azion/cf-to-azion-comprehensive-guide.mdx

@@ -167,10 +167,10 @@ A migration can appear successful when the build passes but fail later when runt
 
 | Task | Cloudflare | Azion |
 | :--- | :--------- | :---- |
-| **Install** | `npm install -g wrangler` | `curl -fsSL https://cli.azion.app/install.sh \| bash` |
-| **Login** | `wrangler login` | `azion login` |
-| **Local dev** | `wrangler pages dev ./dist` | `azion dev` |
-| **Deploy** | `wrangler pages deploy ./dist` | `azion deploy` |
+| **Install** | `npm i -D wrangler@latest` | `curl -fsSL https://cli.azion.app/install.sh \| bash` |
+| **Login** | `npx wrangler login` | `azion login` |
+| **Local dev** | `npx wrangler pages dev ./dist` | `azion dev` |
+| **Deploy** | `npx wrangler pages deploy ./dist` | `azion deploy` |
 
 #### Review Questions
 
@@ -365,10 +365,10 @@ Functions are the computational engine of modern distributed applications. They
 
 | Aspect | Cloudflare Workers | Azion Functions |
 | :----- | :----------------- | :-------------- |
-| **Function signature** | `fetch(request, env, ctx)` | `fetch(request)` |
+| **Function signature** | `fetch(request, env, ctx)` | `fetch(request, env, ctx)` |
 | **Environment access** | `env.VARIABLE` | `Azion.env.get('VARIABLE')` |
-| **Memory** | 128 MB free, 2 GB paid | 512 MB all plans |
-| **Cold starts** | Possible | Eliminated |
+| **Memory** | 128 MB (all plans) | Check documentation for current limits |
+| **Cold starts** | Possible | Possible (minimized with edge distribution) |
 
 #### Update Function Signature
 
@@ -383,7 +383,7 @@ export default {
 
 // After: Azion
 export default {
-  async fetch(request) {
+  async fetch(request, env, ctx) {
     const apiKey = Azion.env.get('API_KEY');
     return fetch(apiUrl, { headers: { 'Authorization': \`Bearer \${apiKey}\` }});
   }
@@ -402,11 +402,24 @@ const country = request.metadata['geoip_country_code'];
 
 #### Update Service Imports
 
+Azion provides two SQL interfaces:
+- **Runtime API** (`azion:sql`) — for querying databases from Edge Functions
+- **Azion Lib SDK** (`azion/sql`) — for managing databases via API (build tools, scripts)
+
 <Code lang="javascript" code={`
 import { Database } from 'azion:sql';
 
-const db = new Database('my-database');
-const result = await db.prepare('SELECT * FROM users').all();
+// Open connection (async)
+const db = await Database.open('my-database');
+
+// Query and iterate results
+const rows = await db.query('SELECT * FROM users');
+let row = await rows.next();
+while (row) {
+  const name = row.getString(0); // access column by index
+  console.log(name);
+  row = await rows.next();
+}
 `} />
 
 #### Reference documentation
@@ -415,6 +428,8 @@ const result = await db.prepare('SELECT * FROM users').all();
 * [Functions Instances](https://www.azion.com/en/documentation/products/build/applications/functions-instances/)
 * [Runtime APIs](https://www.azion.com/en/documentation/products/build/develop-with-azion/runtime-apis/)
 * [JavaScript Runtime APIs reference](https://www.azion.com/en/documentation/runtime-apis/javascript/)
+* [SQL Database API (Runtime)](https://www.azion.com/en/documentation/runtime/api-reference/sql-database.md)
+* [Azion Lib SQL (SDK)](https://www.azion.com/en/documentation/products/azion-lib/sql.md)
 
 ### 7. Migrating Load Balancing