[install] complete the changelog for release v1.00.00 by adding a known issues section

Author: valassi

epochX/cudacpp/CODEGEN/PLUGIN/CUDACPP_SA_OUTPUT/CHANGELOG.md

@@ -2,18 +2,35 @@
 
 All notable changes to this project will be documented in this file.
 
-The format is based on [Keep a Changelog](https://keepachangelog.com).
+The format is loosely based on [Keep a Changelog](https://keepachangelog.com).
 
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-## [1.00.00] - 2024-10-02
+## [1.00.00] - 2024-10-03
 
 ### Added
 
 - (OM+AV+SR+SH+ZW+JT+DM) First release of the MG5aMC CUDACPP plugin.
   - Validated and released for MG5aMC version 3.6.0.
-  - Hosted in the https://github.com/madgraph5/madgraph4gpu original repo,
-    using the original directory structure (plugin is epochX/cudacpp/CODEGEN/PLUGIN/CUDACPP_SA_OUTPUT).
+  - Hosted in the https://github.com/madgraph5/madgraph4gpu original repo.
+  - Repo uses the original directory structure (plugin is epochX/cudacpp/CODEGEN/PLUGIN/CUDACPP_SA_OUTPUT).
+
+### Known issues
+
+- This section lists some of the main new issues identified in release v1.00.00.
+
+- General issues
+  - (#959) Cross-section instabilities when changing vector size between 32 and 16384.
+  - (#993) LHE file mismatch (fortran vs cudacpp) in the experimental multi-backend gridpacks.
+
+- Platform-specific issues
+  - (#1011) Floating Point Exceptions in vxxxxx in the HIP backend.
+
+- Physics-process-specific issues
+  - (#944) Cross-section mismatch (fortran vs cudacpp) in Drell-Yan plus 4 jets.
+  - (#942) Floating Point Exceptions in Drell-Yan plus 0 to 2 jets (workaround: `CUDACPP_RUNTIME_DISABLEFPE=1`).
+  - (#846) ME mismatch (HRDCOD=1 vs HRDCOD=1) in EWdim6 models.
+  - (#601) Builds fail with very complex final states (e.g. gg to ttgggg).
 
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