feat: filter top-level resource with embed filter

This is enabled by adding `!inner` to the embedded resource

/projects?select=*,clients!inner(*)&clients.id=eq.12

This behaviour can be enabled by default with the config option

db-embed-default-join='inner'

Which saves the need for specifying `!inner` on every request.
If this is enabled, the previous behavior can be restored
per request by specifying `!left`  on the embedded resource.

/projects?select=*,clients!left(*)&clients.id=eq.12`

Tested on M20/02M/M2M relationships, views, RPC.

test/Main.hs

@@ -30,6 +30,7 @@ import qualified Feature.CorsSpec
 import qualified Feature.DeleteSpec
 import qualified Feature.DisabledOpenApiSpec
 import qualified Feature.EmbedDisambiguationSpec
+import qualified Feature.EmbedInnerJoinSpec
 import qualified Feature.ExtraSearchPathSpec
 import qualified Feature.HtmlRawOutputSpec
 import qualified Feature.IgnorePrivOpenApiSpec
@@ -94,6 +95,7 @@ main = do
 
   let withApp              = app testCfg
       maxRowsApp           = app testMaxRowsCfg
+      embedInnerJoinApp    = app testEmbedInnerJoinCfg
       disabledOpenApi      = app testDisabledOpenApiCfg
       proxyApp             = app testProxyCfg
       noJwtApp             = app testCfgNoJWT
@@ -125,6 +127,7 @@ main = do
         , ("Feature.CorsSpec"                , Feature.CorsSpec.spec)
         , ("Feature.DeleteSpec"              , Feature.DeleteSpec.spec)
         , ("Feature.EmbedDisambiguationSpec" , Feature.EmbedDisambiguationSpec.spec)
+        , ("Feature.EmbedInnerJoinSpec"      , Feature.EmbedInnerJoinSpec.spec)
         , ("Feature.InsertSpec"              , Feature.InsertSpec.spec actualPgVersion)
         , ("Feature.JsonOperatorSpec"        , Feature.JsonOperatorSpec.spec actualPgVersion)
         , ("Feature.OpenApiSpec"             , Feature.OpenApiSpec.spec actualPgVersion)
@@ -207,6 +210,10 @@ main = do
     parallel $ before multipleSchemaApp $
       describe "Feature.MultipleSchemaSpec" $ Feature.MultipleSchemaSpec.spec actualPgVersion
 
+    -- this test runs with db-embed-default-join = inner
+    before embedInnerJoinApp $
+      describe "Feature.EmbedInnerJoinSpecNotDefaultConfig" Feature.EmbedInnerJoinSpec.notDefaultConfig
+
     -- Note: the rollback tests can not run in parallel, because they test persistance and
     -- this results in race conditions