docs(azure-linux): clarify resource lifecycle on stop vs delete (#713)

The existing README for the Azure Linux template only mentioned that the
VM is ephemeral and the managed disk is persistent, but did not explain
that the resource group, virtual network, subnet, and network interface
also persist when a workspace is stopped.

This led to confusion where users expected all Azure resources to be
cleaned up on stop, when in reality only the VM is destroyed.

## Changes

- Added the persistent networking/infrastructure resources to the
resource list
- Added "What happens on stop" section explaining which resources
persist and why
- Added "What happens on delete" section confirming all resources are
cleaned up
- Moved the existing note about ephemeral tools/files into a "Workspace
restarts" subsection for clarity

Created on behalf of @DevelopmentCats

Co-authored-by: blink-so[bot] <211532188+blink-so[bot]@users.noreply.github.com>
Co-authored-by: DevCats <christofer@coder.com>

Author: 3 people

registry/coder/templates/azure-linux/README.md

@@ -27,8 +27,21 @@ This template provisions the following resources:
 
 - Azure VM (ephemeral, deleted on stop)
 - Managed disk (persistent, mounted to `/home/coder`)
+- Resource group, virtual network, subnet, and network interface (persistent, required by the managed disk and VM)
 
-This means, when the workspace restarts, any tools or files outside of the home directory are not persisted. To pre-bake tools into the workspace (e.g. `python3`), modify the VM image, or use a [startup script](https://registry.terraform.io/providers/coder/coder/latest/docs/resources/script). Alternatively, individual developers can [personalize](https://coder.com/docs/dotfiles) their workspaces with dotfiles.
+### What happens on stop
+
+When a workspace is **stopped**, only the VM is destroyed. The managed disk, resource group, virtual network, subnet, and network interface all persist. This is by design — the managed disk retains your `/home/coder` data across workspace restarts, and the other resources remain because the disk depends on them.
+
+This means you will see these Azure resources in your subscription even when a workspace is stopped. This is expected behavior.
+
+### What happens on delete
+
+When a workspace is **deleted**, all resources are destroyed, including the resource group, networking resources, and managed disk.
+
+### Workspace restarts
+
+Since the VM is ephemeral, any tools or files outside of the home directory are not persisted across restarts. To pre-bake tools into the workspace (e.g. `python3`), modify the VM image, or use a [startup script](https://registry.terraform.io/providers/coder/coder/latest/docs/resources/script). Alternatively, individual developers can [personalize](https://coder.com/docs/dotfiles) their workspaces with dotfiles.
 
 > [!NOTE]
 > This template is designed to be a starting point! Edit the Terraform to extend the template to support your use case.