Antoine Leblanc 4815fcd500 server: progress on generic metadata ... This PR generalizes a bunch of metadata structures. Most importantly, it changes `SourceCache` to hold existentially quantified values: ``` data BackendSourceInfo = forall b. Backend b => BackendSourceInfo (SourceInfo b) type SourceCache = HashMap SourceName BackendSourceInfo ``` This changes a *lot* of things throughout the code. For now, all code using the schema cache explicitly casts sources to Postgres, meaning that if any non-Postgres `SourceInfo` makes it to the cache, it'll be ignored. That means that after this PR is submitted, we can split work between two different aspects: - creating `SourceInfo` for other backends - handling those other sources down the line GitOrigin-RevId: fb9ea00f32e840fc33c5467896fb1dfa5283ab42		2021-01-20 00:32:45 +00:00
..
ScheduledTrigger	server: simplify JSON instances	2021-01-19 19:15:42 +00:00
Common.hs	server: metadata storage abstraction for scheduled triggers	2020-11-25 10:57:38 +00:00
EventTrigger.hs	server: progress on generic metadata	2021-01-20 00:32:45 +00:00
HTTP.hs	server: simplify JSON instances	2021-01-19 19:15:42 +00:00
ScheduledTrigger.hs	server: simplify JSON instances	2021-01-19 19:15:42 +00:00