Fix core.error parameter format, update CHANGELOG.md

This is really annoying, the docs state nothing about the parameter
format; maybe it should be implied, but there are zero examples showing
the combined message/AnnotationProperty interface with 2 parameters.

.github/workflows/checklist.yaml

@@ -24,7 +24,8 @@ jobs:
                   return;
 
                 if (line.toLowerCase().includes('unreleased')) {
-                  core.error({
+                  const message = 'Unreleased section found. Please release the changes before merging.';
+                  core.error(message, {
                     title: 'Unreleased Section Found',
                     file: path,
                     startline: index,
@@ -35,7 +36,8 @@ jobs:
                 // Expected format: '## [X.Y.Z] - YYYY-MM-DD'
                 const pattern = /^\d+\.\d+\.\d+ - \d{4}-\d{2}-\d{2}$/;
                 if (pattern.test(line)) {
-                  core.error({
+                  const message = 'Invalid version/date format. Expected: "## [X.Y.Z] - YYYY-MM-DD"';
+                  core.error(message, {
                     title: 'Invalid Version/Date Format',
                     file: path,
                     startline: index,

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - A release checklist to the `CHANGELOG.md` file, as a reminder for procedure.
 - An action workflow for invoking `pytest`
+- Pytest coverage report generation in the CI/CD pipeline
 - backend: `pwdlib[argon2]` for password hashing
 - backend: provided `LOG_JSON_FORMAT` and `LOG_LEVEL` environment variable defaults in `run.sh` development script
 - backend: `User` model, `Session` model with migration script