Reformat checkpoint store readme to match the style of other SDK readme files (#2883)

Fixes #2872

---------

Co-authored-by: Copilot <[email protected]>

Author: LarryOsterman

sdk/eventhubs/azure_messaging_eventhubs_checkpointstore_blob/README.md

@@ -1,3 +1,4 @@
+
 # Azure Event Hubs Checkpoint Store for Blob Storage
 
 This crate provides a checkpoint store implementation for Azure Event Hubs using Azure Blob Storage as the backend. It implements the `CheckpointStore` trait from the `azure_messaging_eventhubs` crate, allowing you to persist checkpoints (event positions) to Azure Blob Storage.
@@ -9,18 +10,64 @@ This crate provides a checkpoint store implementation for Azure Event Hubs using
 - **Concurrency Support**: Handle multiple processors with proper concurrency control
 - **Easy Integration**: Drop-in replacement for other checkpoint store implementations
 
-## Usage
+[Source code] | [Package (crates.io)] | [API reference documentation] | [Product documentation]
+
+## Getting started
+
+### Install the package(s)
+
+Install the Azure Event Hubs, Azure Blob Storage, and Blob Checkpoint Store client libraries for Rust with [Cargo]:
+
+```sh
+cargo add azure_messaging_eventhubs
+cargo add azure_storage_blob
+cargo add azure_messaging_eventhubs_checkpointstore_blob
+```
+
+### Prerequisites
+
+- A Rust Compiler. See [the rust compiler installation instructions](https://www.rust-lang.org/tools/install).
+- An [Azure subscription]
+- The [Azure CLI]
+- An [Event Hub namespace](https://learn.microsoft.com/azure/event-hubs/).
+- An Event Hub instance. You can create an Event Hub instance in your Event Hubs Namespace using the [Azure Portal](https://learn.microsoft.com/azure/event-hubs/event-hubs-create), or the [Azure CLI](https://learn.microsoft.com/azure/event-hubs/event-hubs-quickstart-cli).
+
+If you use the Azure CLI, replace `<your-resource-group-name>`, `<your-eventhubs-namespace-name>`, and `<your-eventhub-name>` with your own, unique names:
+
+Create an Event Hubs Namespace:
+
+```azurecli
+az eventhubs namespace create --resource-group <your-resource-group-name> --name <your-eventhubs-namespace-name> --sku Standard
+```
+
+Create an Event Hub Instance:
+
+```azurecli
+az eventhubs eventhub create --resource-group <your-resource-group-name> --namespace-name <your-eventhubs-namespace-name> --name <your-eventhub-name>
+```
+
+### Install dependencies
+
+Add the following crates to your project:
+
+```sh
+cargo add azure_identity tokio azure_messaging_eventhubs azure_storage_blob
+```
+
+### Authenticate the client
 
-Add this to your `Cargo.toml`:
+Before interacting with Azure services, you need a credential to use to authenticate and authorize the user.
 
-```toml
-[dependencies]
-azure_messaging_eventhubs_checkpointstore_blob = "0.1.0"
-azure_messaging_eventhubs = "0.20.0"
-azure_storage_blobs = "0.20.0"
-azure_identity = "0.20.0"
+The example shown below uses a [`DefaultAzureCredential`][default_cred_ref], which is appropriate for most local development environments. Additionally, we recommend using a managed identity for authentication in production environments. You can find more information on different ways of authenticating and their corresponding credential types in the [Azure Identity] documentation.
+
+The `DefaultAzureCredential` will automatically pick up on an Azure CLI authentication. Ensure you are logged in with the Azure CLI:
+
+```azurecli
+az login
 ```
 
+Instantiate a `DefaultAzureCredential` to pass to the client. The same instance of a token credential can be used with multiple clients if they will be authenticating with the same identity.
+
 ### Basic Example
 
 This example creates a blob container client on the storage account which will hold the blob checkpoint store, and configures a blob checkpoint store to use that storage client.
@@ -72,27 +119,54 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 }
 ```
 
-## Container Structure
-
-The checkpoint store creates blobs in the following structure:
-
-```text
-container/
-├── prefix/
-│   ├── eventhub-name/
-│   │   ├── consumer-group/
-│   │   │   ├── partition-0
-│   │   │   ├── partition-1
-│   │   │   └── ...
-│   │   └── ownership/
-│   │       ├── owner-1.json
-│   │       ├── owner-2.json
-│   │       └── ...
-```
-
 ## Examples
 
 See the `examples/` directory for more detailed usage examples:
 
 - `checkpoint_store_basic.rs`: Basic checkpoint operations
 - `processor_with_blob_checkpoints.rs`: Complete EventHubs processor setup
+
+## Troubleshooting
+
+### General
+
+When you interact with the Azure Event Hubs Checkpoint Store  using the Rust SDK, errors returned by the service are returned as `azure_core::Error` values. However in general, client applications will not interact with the Checkpoint Store - the Checkpoint Store functionality is primarily used by the Event Hubs event processor.
+
+### Logging
+
+The Event Hubs SDK client uses the [tracing](https://docs.rs/tracing/latest/tracing/) package to
+enable diagnostics.
+
+## Contributing
+
+See the [CONTRIBUTING.md] for details on building, testing, and contributing to these libraries.
+
+This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit <https://opensource.microsoft.com/cla/>.
+
+When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.
+
+This project has adopted the [Microsoft Open Source Code of Conduct]. For more information see the [Code of Conduct FAQ] or contact <[email protected]> with any additional questions or comments.
+
+### Reporting security issues and security bugs
+
+Security issues and bugs should be reported privately, via email, to the Microsoft Security Response Center (MSRC) <[email protected]>. You should receive a response within 24 hours. If for some reason you do not, please follow up via email to ensure we received your original message. Further information, including the MSRC PGP key, can be found in the [Security TechCenter](https://www.microsoft.com/msrc/faqs-report-an-issue).
+
+### License
+
+Azure SDK for Rust is licensed under the [MIT](https://github.com/Azure/azure-sdk-for-cpp/blob/main/LICENSE.txt) license.
+
+<!-- LINKS -->
+<!--[API reference documentation]: https://docs.rs/azure_messaging_eventhubs_checkpointstore_blob/latest/azure_messaging_eventhubs_checkpointstore_blob-->
+[API reference documentation]: https://docs.rs/azure_messaging_eventhubs/latest/azure_messaging_eventhubs
+[Azure CLI]: https://learn.microsoft.com/cli/azure
+[Azure subscription]: https://azure.microsoft.com/free/
+[Azure Identity]: https://github.com/Azure/azure-sdk-for-rust/tree/main/sdk/identity/azure_identity
+[Microsoft Open Source Code of Conduct]: https://opensource.microsoft.com/codeofconduct/
+[Product documentation]: https://learn.microsoft.com/azure/event-hubs/
+[Cargo]: https://crates.io/
+<!--[Package (crates.io)]: https://crates.io/crates/azure_messaging_eventhubs_checkpointstore_blob-->
+[Package (crates.io)]: https://crates.io/crates/azure_messaging_eventhubs
+[Source code]: https://github.com/Azure/azure-sdk-for-rust/tree/main/sdk/eventhubs/azure_messaging_eventhubs_checkpointstore_blob/src
+[CONTRIBUTING.md]: https://github.com/Azure/azure-sdk-for-rust/blob/main/CONTRIBUTING.md
+[Code of Conduct FAQ]: https://opensource.microsoft.com/codeofconduct/faq/
+[default_cred_ref]: https://docs.rs/azure_identity/latest/azure_identity/struct.DefaultAzureCredential.html