CCM-12607: Updated TTL diagrams (#41)

Co-authored-by: Ross Buggins (NHS) <[email protected]>

Author: tdroza-nhs

docs/architecture/c4/ttl/create-ttl.md

@@ -15,12 +15,12 @@ author: Tom D'Roza
     group createTtl(cloud)[Time_To_Live]
 
     service db(logos:aws-dynamodb)[DynamoDB] in createTtl
-    service createLambda(logos:aws-lambda)[Create print ttl] in createTtl
+    service createLambda(logos:aws-lambda)[Create PrintLetter TTL] in createTtl
     service queue(logos:aws-sqs)[SQS] in createTtl
     service storedEvent(logos:aws-eventbridge)[LetterStored event]
-    service scheduledEvent(logos:aws-eventbridge)[LetterPrintingScheduled event]
+    service scheduledEvent(logos:aws-eventbridge)[PrintingScheduled event]
 
     storedEvent:R --> L:queue
     queue:R --> L:createLambda
     createLambda:R --> L:db
-    db:R --> L:scheduledEvent
+    createLambda:T --> L:scheduledEvent

docs/diagrams/create-print-ttl-sequence.md

@@ -14,8 +14,8 @@ author: Tom D'Roza
 ```mermaid
 sequenceDiagram
   participant eb as Event Bridge
-  participant sqs as SQS
-  participant createTTL as Create TTL Lambda
+  participant sqs as SQS<br/>CreateTTLQueue
+  participant createTTL as Lambda<br/>CreateTTL
   participant dynamo as DynamoDB
 
 

docs/diagrams/expire-print-ttl-sequence.md

@@ -15,8 +15,8 @@ author: Tom D'Roza
 sequenceDiagram
   participant dynamo as DynamoDB
   participant stream as DynamoDB Stream
-  participant expireTTL as Expire TTL Lambda
-  participant processTTLExpiry as Process TTL Expiry Lambda
+  participant expireTTL as Lambda<br/>ExpireOverdueTTL
+  participant processTTLExpiry as Lambda<br/>ProcessTTLExpiry
   participant eb as Event Bridge
 
   alt Dynamo auto-expires after TTL
@@ -27,6 +27,7 @@ sequenceDiagram
   else Polling Lamba expires after TTL
     expireTTL ->> dynamo:
     dynamo ->> stream: TTL expired
+    stream ->> processTTLExpiry:
     processTTLExpiry ->> eb: PrintTTLExpired Event
   end
 ```