Need an indexing error reporting mechanism

[cjlee112]

we need a way to report to users that spnet hit a problem while trying to index their post. Right now people get frustrated because their post vanishes into a black hole (doesn't get indexed) and they have no way to know why.

[cjlee112]

basic proposal:

• if index processing had no errors, save a "success" report, timestamped
• if errors, save to report.
• Old reports can be deleted from the db by a separate cleanup process.

schema:

• post ID
• source
• author info
• status: success or error
• reported: flag whether reported to user
• timestamp
• error list: error code (for filter queries), text message (to explain problem to user and offer advice)

[cjlee112]

user's page on spnet could either display or link to a view of any error reports for that user.

Could also have a error page that would display recent errors so we could pro-actively give advice back to the user, e.g. just copy-paste the advice message as a comment to the original post.