Dead-letter triage: logs request fails

[rclark]

$ watchbot dead-letter -r us-east-1 -s my-stack
? Would you like to: Triage dead messages individually?

Subject: subject
Message: {"my":"json message"}
? Would you like to: View this message's recent logs?
⠙ Searching CloudWatch logs...InvalidParameterException: Invalid filter pattern
    at Request.extractError (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/protocol/json.js:43:27)
    at Request.callListeners (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/sequential_executor.js:105:20)
    at Request.emit (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/sequential_executor.js:77:10)
    at Request.emit (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/request.js:671:14)
    at Request.transition (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/request.js:22:10)
    at AcceptorStateMachine.runTo (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/state_machine.js:14:12)
    at /Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/state_machine.js:26:10
    at Request.<anonymous> (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/request.js:38:9)
    at Request.<anonymous> (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/request.js:673:12)
    at Request.callListeners (/Users/r/code/ecs-watchbot/node_modules/aws-sdk/lib/sequential_executor.js:115:18)

This is ultimately a misuse of logs.fetch which expects to be handed an SQS message ID. In the dead-letter triage, we are sending it an entire SNS message. There are probably some incorrectly-escaped double quotes biting us.