Documentation of dynamic message exchange behavior in `README.md` needs explanation

[DDvO]

The three message sequence diagrams in the README:

• https://github.com/siemens/cmp-ra-component?tab=readme-ov-file#dynamic-message-exchange-behavior-on-the-downstream-cmp-interface-and-upstream-pkcs10x509-interface
• https://github.com/siemens/cmp-ra-component?tab=readme-ov-file#dynamic-message-exchange-behavior-for-downstream-and-upstream-cmp-interface
• https://github.com/siemens/cmp-ra-component?tab=readme-ov-file#dynamic-message-exchange-behavior-for-downstream-and-upstream-cmp-interface-1

are very hard to understand, if at all, without explanation.

[Akretsch]

Its by design. To make it more easy It would be useful to separate the delayed delivery and the straight forward case completely.

[DDvO]

The design is fine. Splitting the figure will not help that much. A couple of explaining sentences should help most.