[DRAFT] DPL: Introduce calibration mode

Author: ktf

Framework/CHANGELOG.md

@@ -1,4 +1,10 @@
 # 2024-02-22: Move DataProcessingDevice to use Signposts
+# 2024-02-24: Introduce calibration mode
+
+This introduces a new --data-processing-timeout `<timeout>` option which can be used to specify
+that data processing should finish after `<timeout>` seconds. After it, only the messages which are produced on EndOfStream will be send.
+
+# 2024-02-23: Move DataProcessingDevice to use Signposts
 
 All the messages from DataProcessingDevice have been migrated to use Signpost.
 This will hopefully simplify debugging.