Publish a feed or custom entries for Coldsweat fetcher status

[passiomatic]

Every Coldsweat installation could generate a feed for its status information. Such feed would include:

• Feeds disabled by the system due to many errors
• Fetch results

This is not as straightforward as one may think. This imply one of these approaches:

• Keep an history of events, a sort of log in a separate database table. Such table is queried every time such feed is requested. We can take the last 10 events/last week to be exposed.
• Save an atom feed on disk after each status update. Such feed need to be read from disk, parsed, probably trimmed and updated on request.

[passiomatic]

Another simpler solution would be to synthesize a new entry when a feed is disabled. This way user will be notified in the feed itself, without any additional effort from her part and without exposing subscribed feeds information outside Coldsweat.