Alert titles: make more useful

[danielbeardsley]

"Threshold of 0 reached ..." Is pretty useless as far as an alert title goes.

Let's get the message in there earlier:
No request stats recorded since ...

There are a number of pieces of data:

• Alert message
• Level
• Number of successive failures

Not sure exactly how those should be arranged, but the current behavior is pretty wonky.

[danielbeardsley]

CC @n-fisher

[n-fisher]

Templates

Voice:

{Notice|Warning|Critical} Alert: $Message. Threshold of $threshold reached.

Text:

{Notice|Warning|Critical} Alert: $Message. Threshold of $threshold reached at $Timestamp.

comment on these and I'll revise until we have consensus on desired message.

[danielbeardsley]

How about:

{Notice|Warning|Critical} Alert: $Message. Started failing X time ago

Or if we can't get the time:

{Notice|Warning|Critical} Alert: $Message. Failed X checks in a row.

[n-fisher]

@iFixit/coders

[sctice]

I'd consider dropping "Alert", since I think it's implied by something like "Notice:" or "Critical:".