update diagrams and text

www/apps/book/app/architecture/architectural-modules/page.mdx

@@ -18,7 +18,7 @@ Since modules are interchangeable, you have more control over Medusa’s archite
 
 There are different architectural module types including:
 
-![Diagram illustrating how the modules connect to third-party services](https://res.cloudinary.com/dza7lstvk/image/upload/v1716197340/Medusa%20Book/architectural-modules_bj9bb9.jpg)
+![Diagram illustrating how the modules connect to third-party services](https://res.cloudinary.com/dza7lstvk/image/upload/v1727095814/Medusa%20Book/architectural-modules_bj9bb9.jpg)
 
 - Cache Module: Defines the caching mechanism or logic to cache computational results.
 - Event Module: Integrates a pub/sub service to handle subscribing to and emitting events.

www/apps/book/app/architecture/overview/page.mdx

@@ -6,15 +6,13 @@ export const metadata = {
 
 In this chapter, you'll learn about the architectural layers in Medusa.
 
-## API Layer
+## HTTP, Workflow, and Module Layers
 
-Medusa's server is headless. So, clients, such as storefronts or admin dashboards, send HTTP requests to Medusa's API routes to provide commerce features.
+Medusa's server is headless. So, clients, such as storefronts or admin dashboards, send HTTP requests to Medusa's API routes to consume commerce features.
 
-The API routes use the Medusa framework's tools to perform functionalities implemented in Medusa's commerce modules.
+The API routes use workflows, powered by Medusa's workflows SDK, to perform functionalities implemented in commerce and architectural modules.
 
-The framework tools include workflows, module links, Query, architectural modules, and more orchestration tools under-the-hood.
-
-![Diagram illustrating the HTTP layer](https://res.cloudinary.com/dza7lstvk/image/upload/v1727094282/http-layer_sroafr.jpg)
+![Diagram illustrating the HTTP layer](https://res.cloudinary.com/dza7lstvk/image/upload/v1727175296/Medusa%20Book/http-layer_sroafr.jpg)
 
 ---
 
@@ -24,11 +22,11 @@ The Medusa application injects into each module a connection to the configured P
 
 Modules use that connection to read and write data to the database.
 
-![Diagram illustrating the database layer](https://res.cloudinary.com/dza7lstvk/image/upload/v1727094431/db-layer_pi7tix.jpg)
+![Diagram illustrating the database layer](https://res.cloudinary.com/dza7lstvk/image/upload/v1727175379/Medusa%20Book/db-layer_pi7tix.jpg)
 
 ---
 
-## Service Layer
+## Service Integrations
 
 Third-party services are integrated through commerce and architectural modules.
 
@@ -40,18 +38,18 @@ Commerce modules integrate third-party services relevant for commerce or user-fa
 
 These integrations are used when an HTTP request is sent, or as a result of a scheduled action or an emitted event.
 
-![Diagram illustrating the commerce modules integration to third-party services](https://res.cloudinary.com/dza7lstvk/image/upload/v1727095115/service-commerce_qcbdsl.jpg)
+![Diagram illustrating the commerce modules integration to third-party services](https://res.cloudinary.com/dza7lstvk/image/upload/v1727175357/Medusa%20Book/service-commerce_qcbdsl.jpg)
 
 ### Architectural Modules
 
 Architectural modules integrate third-party services and systems for architectural features. For example, you integrate Redis as a pub/sub service to send events, or SendGrid to send notifications.
 
-![Diagram illustrating the architectural modules integration to third-party services and systems](https://res.cloudinary.com/dza7lstvk/image/upload/v1727095146/service-arch_ozvryw.jpg)
+![Diagram illustrating the architectural modules integration to third-party services and systems](https://res.cloudinary.com/dza7lstvk/image/upload/v1727175342/Medusa%20Book/service-arch_ozvryw.jpg)
 
 ---
 
 ## Full Diagram of Medusa's Architecture
 
 The following diagram illustrates Medusa's architecture over the three layers.
 
-![Full diagram illustrating Medusa's architecture](https://res.cloudinary.com/dza7lstvk/image/upload/v1727095208/architectural-diagram-full.jpg)
+![Full diagram illustrating Medusa's architecture](https://res.cloudinary.com/dza7lstvk/image/upload/v1727174897/Medusa%20Book/architectural-diagram-full.jpg)