docs: builder, business-delegate, bytecode, caching, callback, chain diagrams

caching/README.md

@@ -34,6 +34,10 @@ Wikipedia says
 
 > In computing, a cache is a hardware or software component that stores data so that future requests for that data can be served faster; the data stored in a cache might be the result of an earlier computation or a copy of data stored elsewhere. A cache hit occurs when the requested data can be found in a cache, while a cache miss occurs when it cannot. Cache hits are served by reading data from the cache, which is faster than recomputing a result or reading from a slower data store; thus, the more requests that can be served from the cache, the faster the system performs.
 
+Flowchart
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+![Caching flowchart](./etc/caching-flowchart.png)
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 ## Programmatic Example of Caching Pattern in Java
 
 In this programmatic example, we demonstrate different Java caching strategies, including write-through, write-around, and write-behind, using a user account management system.