Add changelog entries

Co-authored-by: Agustin Mista <[email protected]>
Co-authored-by: Alexander Esgen <[email protected]>
Co-authored-by: Georgy Lukyanov <[email protected]>
Co-authored-by: Thomas BAGREL <[email protected]>
Co-authored-by: Nicolas BACQUEY <[email protected]>

Author: 5 people

ouroboros-consensus-diffusion/changelog.d/20251201_130629_agustin.mista_new_defs_and_plumbing.md

@@ -0,0 +1,25 @@
+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+For top level release notes, leave all the headers commented out.
+-->
+
+<!--
+### Patch
+
+- A bullet item for the Patch category.
+
+-->
+
+### Non-Breaking
+
+- Add plumbing to provide a SystemTime to the PerasCertDB in ordert to record
+  certificate arrival times.
+
+<!--
+### Breaking
+
+- A bullet item for the Breaking category.
+
+-->

ouroboros-consensus/changelog.d/20251201_130034_agustin.mista_new_defs_and_plumbing.md

@@ -0,0 +1,26 @@
+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+For top level release notes, leave all the headers commented out.
+-->
+
+<!--
+### Patch
+
+- A bullet item for the Patch category.
+
+-->
+### Non-Breaking
+
+- Introduce `Ouroboros.Consensus.Peras.Params` module.
+- Introduce `WithArrivalTime` combinator.
+- Refactor `HasPerasCertX` field projection typeclasses.
+- Add `getLatestCertSeen` method to the PerasCertDB API.
+
+<!--
+### Breaking
+
+- A bullet item for the Breaking category.
+
+-->