Rename events to adhere to the "Noun Action" naming convention (#1763)

## Description

Rename events to adhere to naming convention 

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [ ] 💻 CI/Deployment
- [ ] 🐹 Trivial/Minor

## Issue(s)

## Test Plan

<!-- How will this be tested prior to merging.-->
- [x] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

src/internal/events/events.go

@@ -23,11 +23,13 @@ const (
 	tenantID     = "m365_tenant_hash"
 
 	// Event Keys
-	RepoInit     = "repo_init"
+	CorsoStart   = "Corso Start"
-	BackupStart  = "backup_start"
+	RepoInit     = "Repo Init"
-	BackupEnd    = "backup_end"
+	RepoConnect  = "Repo Connect"
-	RestoreStart = "restore_start"
+	BackupStart  = "Backup Start"
-	RestoreEnd   = "restore_end"
+	BackupEnd    = "Backup End"
+	RestoreStart = "Restore Start"
+	RestoreEnd   = "Restore End"
 
 	// Event Data Keys
 	BackupCreateTime = "backup_creation_time"