report: add gantt diagram

report.md

@@ -407,7 +407,41 @@ used to debug problems I encountered during their development.
 
 ## Gantt diagram
 
-FIXME
+```plantuml
+@startgantt
+
+ganttscale weekly
+
+Project starts 2021-03-01
+
+-- Team 1 --
+[Discovering the codebase] as [Discover] lasts 14 days
+then [Proof Of Concept] as [POC] lasts 7 days
+then [Model RDS Server] as [RDS] lasts 14 days
+then [Framework v0] as [v0] lasts 14 days
+then [Refactor to v1] as [v1] lasts 14 days
+then [Initial results analysis] as [Analysis] lasts 7 days
+then [Dumping internal measurements] as [EventAnalysis] lasts 7 days
+then [Benchmark different gateway] as [NNF] lasts 14 days
+
+[Compatibility testing] starts 2021-05-30
+note bottom
+Fixing bugs
+Reducing flakiness
+end note
+[Compatibility testing] ends 2021-08-15
+
+[Intern week] starts 2021-06-28
+note bottom
+Learn about option theory
+end note
+[Intern week] ends 2021-07-04
+
+[Holidays] starts 2021-08-16
+[Holidays] ends 2021-09-01
+
+@endgantt
+```
 
 # Engineering practices