sql: Add support for releases published as part of a record

[Bjwebb]

Issue: #110

I have updated:

• table tmp_release_summary to select the releases, which is then used by all the other create table statements
• view parties_summary, to lookup the correct release from data.data (which stores the parent record)

The following always include data.data directly, even for a release type of record, so I haven't added a lookup for this new release type:

• view tender_summary_with_data
• view awards_summary
• view contracts_summary
• view release_summary_with_data

For the release_type I have used releases_within_record instead of releasesWithinRecord for consistency with compiled_release.

For the id, I have used: 1_000_000_000 * record.id + release_index. We may want to tweak this, or do something completely different. I have chosen the multiplier because its roughly the square root of the bigint maximum. Checking the kingfisher server, the largest record id is ~ 24_000_000, so I think this works for the foreseeable future (although that would be good to check with someone who knows the data better).

Releases are assumed to be linked releases (and ignored) if the id key is not present.

[Bjwebb]

Add support in Views for releases published as part of a record