Create dev blog post for certification of Cardano stake distribution

docs/website/blog/2024-10-15-cardano-stake-distribution-certification.md

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+---
+title: Certification of Cardano stake distribution
+authors:
+  - name: Mithril Team
+tags: [certification, cardano stake distribution]
+---
+
+### Certification of Cardano stake distribution
+
+:::info Update 2024/10/21
+
+We have shipped stable support for the **Cardano stake distribution certification** with distributions [2437](https://github.com/input-output-hk/mithril/releases/tag/2437.1) and [2442](https://github.com/input-output-hk/mithril/releases/tag/2442.0).
+
+A threshold of at least **70%** of the stake running version `0.2.182` (within **10** days after the distribution `2442` is released) is mandatory in order to activate the certification of the Cardano stake distribution on the `release-mainnet` network.
+
+The [Mithril Protocol Insights](https://lookerstudio.google.com/u/0/reporting/8b05ea4b-6a43-45ea-aef2-237906ec7a42?s=oi6CR5eZrnQ) dashboard displays the adoption rate of the different signer versions on the `release-mainnet` network.
+
+:::
+
+With the release of the new distribution [2437](https://github.com/input-output-hk/mithril/releases/tag/2437.1), we have started to roll-out the certification of the **Cardano stake distribution** in the Mithril networks.
+
+The Mithril network now provides certified Cardano stake distribution data without requiring a full Cardano node, a useful feature for applications such as bridges and layer 2 solutions. The key features include:
+
+- Certification of the Cardano stake distribution of the ending epoch at each epoch transition.
+- New HTTP routes in the Aggregator REST API to access this certified data.
+- Updates to the Mithril client library and CLI for retrieving and verifying Cardano stake distribution.
+- WASM client support for these functionalities.
+- Mithril Explorer now displays certified Cardano stake distribution.
+
+The roll-out plan of the feature is the following:
+
+- [x] Distribution [2437](https://github.com/input-output-hk/mithril/releases/tag/2437.1):
+  - [x] Activation of the certification of **Cardano stake distribution** in the `pre-release-preview` network.
+  - [x] Activation of the certification of **Cardano stake distribution** in the `release-preprod` network.
+- [x] Distribution [2442](https://github.com/input-output-hk/mithril/releases/tag/2442.0):
+  - [ ] Activation of the certification of **Cardano stake distribution** in the `release-mainnet` network.
+
+For any inquiries or assistance, don't hesitate to reach out to the team on the [Discord channel](https://discord.gg/5kaErDKDRq).