chore(release): publish docs for irtt-proto, irtt-server, irtt-stats

Version the remaining public crates independently so their crate-specific READMEs, examples, and API doctests are represented in release history.

CHANGELOG.md

@@ -10,6 +10,12 @@ release. The format is loosely based on
 
 ## irtt-proto
 
+### 0.5.1
+
+#### Added
+
+- Added a crate-specific README and runnable API doctests to make the published crate's protocol types and codecs easier to discover and use.
+
 ### 0.5.0
 
 #### Added
@@ -62,6 +68,12 @@ release. The format is loosely based on
 
 ## irtt-server
 
+### 0.5.3
+
+#### Added
+
+- Added a crate-specific README and usage examples for single- and multi-listener servers, plus runnable API doctests.
+
 ### 0.5.2
 
 #### Changed
@@ -101,6 +113,12 @@ release. The format is loosely based on
 
 ## irtt-stats
 
+### 0.5.1
+
+#### Added
+
+- Added a crate-specific README, a finite-versus-continuous statistics example, and runnable API doctests for the published crate.
+
 ### 0.5.0
 
 #### Fixed