Add storage account module diagram in README.md

.changeset/eight-years-dress.md

@@ -0,0 +1,5 @@
+---
+"azure_storage_account": patch
+---
+
+Add diagram to readme.md representing the module architecture

infra/modules/azure_storage_account/README.md

@@ -4,6 +4,67 @@
 
 This Terraform module provisions an Azure Storage Account with optional configurations for advanced features, networking, and monitoring.
 
+## Diagram
+
+The following diagram illustrates the architecture and relationships between the main components of this module:
+
+```mermaid
+flowchart LR
+    subgraph Security["Security Layer"]
+        kv["Key Vault"]
+        kv@{ icon: "azure:key-vaults"}
+
+        cmk["Customer Managed Key"]
+        cmk@{ icon: "azure:keys"}
+    end
+
+    subgraph Storage["Primary Storage"]
+        sa["Storage Account"]
+        sa@{ icon: "azure:storage-accounts"}
+
+        containers["Containers"]
+        tables["Tables"]
+        queues["Queues"]
+
+        containers@{ icon: "azure:storage-container" }
+        queues@{ icon: "azure:storage-queue" }
+        tables@{ icon: "azure:table" }
+
+    end
+
+    subgraph Network["Network Layer"]
+        netrules["Network Rules"]
+
+        pep["Private Endpoints"]
+        pep@{ icon: "azure:private-endpoints"}
+    end
+
+    subgraph Monitoring["Monitoring"]
+        alert["Metric Alerts"]
+        alert@{ icon: "azure:monitor"}
+
+        defender["Storage Defender"]
+        defender@{ icon: "azure:microsoft-defender-for-cloud" }
+    end
+
+    subgraph Replication["Geo-Replication (Optional)"]
+        secondary["Secondary Storage Account"]
+        secondary@{ icon: "azure:storage-accounts"}
+    end
+
+    %% Dependencies
+    kv -.-> cmk
+    cmk -.-> sa
+    netrules --> sa
+    pep --> sa
+    sa --> containers
+    sa --> tables
+    sa --> queues
+    sa -.-> secondary
+    alert -.-> sa
+    defender -.-> sa
+```
+
 ## Features
 
 - **Use Case Profiles**: Simplifies deployment by providing pre-configured profiles (`default`, `audit`, `delegated_access`, `development`, `archive`) tailored for specific needs.
@@ -18,13 +79,13 @@ This Terraform module provisions an Azure Storage Account with optional configur
 
 ## Use cases Comparison
 
-| Use case           | Description                                                        | Alerts | Advanced Threat Protection | Replication Type        | Account Tier |
-|--------------------|--------------------------------------------------------------------|--------|----------------------------|-------------------------|--------------|
-| `development`      | Ideal for lightweight workloads, testing, and development.         | No     | No                         | LRS                     | Standard     |
-| `default`          | Suitable for production with moderate to high performance needs.   | Yes    | No                         | ZRS                     | Standard     |
+| Use case           | Description                                                                                                                 | Alerts | Advanced Threat Protection | Replication Type        | Account Tier |
+| ------------------ | --------------------------------------------------------------------------------------------------------------------------- | ------ | -------------------------- | ----------------------- | ------------ |
+| `development`      | Ideal for lightweight workloads, testing, and development.                                                                  | No     | No                         | LRS                     | Standard     |
+| `default`          | Suitable for production with moderate to high performance needs.                                                            | Yes    | No                         | ZRS                     | Standard     |
 | `audit`            | For storing audit logs with high security and long-term retention. (Blob items will be deleted after 3 yaers of inactivity) | Yes    | No                         | ZRS + secondary replica | Standard     |
-| `delegated_access` | For sharing files externally, forcing secure access patterns.      | Yes    | Yes                        | ZRS                     | Standard     |
-| `archive`          | For long-term, low-cost backup and data archiving.                 | No     | No                         | LRS + secondary replica | Standard     |
+| `delegated_access` | For sharing files externally, forcing secure access patterns.                                                               | Yes    | Yes                        | ZRS                     | Standard     |
+| `archive`          | For long-term, low-cost backup and data archiving.                                                                          | No     | No                         | LRS + secondary replica | Standard     |
 
 ## Important Considerations for CDN Origin
 
@@ -58,8 +119,8 @@ For the `delegated_access` use case, this module enhances security by disabling
 
 This model forces applications to first authenticate with Azure Active Directory (Azure AD) to obtain a temporary key. This is a significant security improvement because access is tied to an identity and can be centrally managed and revoked via Azure RBAC. To implement this, you must grant the Storage Blob Delegator role to the identities that need to create SAS tokens.
 
-  **NOTE**:
-  Terraform uses Shared Key Authorisation to provision Storage Containers, Blobs and other items - when Shared Key Access is disabled, you will need to enable the `storage_use_azuread` flag in the Provider block to use Azure AD for authentication, however not all Azure Storage services support Active Directory authentication.
+**NOTE**:
+Terraform uses Shared Key Authorisation to provision Storage Containers, Blobs and other items - when Shared Key Access is disabled, you will need to enable the `storage_use_azuread` flag in the Provider block to use Azure AD for authentication, however not all Azure Storage services support Active Directory authentication.
 
 ## Usage Example