[chore] Add interaction policy gtsmodels (#3075)

* [chore] introduce interaction policy gts models

* update migration a smidge

* fix copy paste typo

* update migration

* use int for InteractionType

internal/cache/db.go

@@ -100,6 +100,9 @@ type GTSCaches struct {
 	// Instance provides access to the gtsmodel Instance database cache.
 	Instance StructCache[*gtsmodel.Instance]
 
+	// InteractionApproval provides access to the gtsmodel InteractionApproval database cache.
+	InteractionApproval StructCache[*gtsmodel.InteractionApproval]
+
 	// InReplyToIDs provides access to the status in reply to IDs list database cache.
 	InReplyToIDs SliceCache[string]
 
@@ -737,6 +740,39 @@ func (c *Caches) initInstance() {
 	})
 }
 
+func (c *Caches) initInteractionApproval() {
+	// Calculate maximum cache size.
+	cap := calculateResultCacheMax(
+		sizeofInteractionApproval(),
+		config.GetCacheInteractionApprovalMemRatio(),
+	)
+
+	log.Infof(nil, "cache size = %d", cap)
+
+	copyF := func(i1 *gtsmodel.InteractionApproval) *gtsmodel.InteractionApproval {
+		i2 := new(gtsmodel.InteractionApproval)
+		*i2 = *i1
+
+		// Don't include ptr fields that
+		// will be populated separately.
+		// See internal/db/bundb/interaction.go.
+		i2.Account = nil
+		i2.InteractingAccount = nil
+
+		return i2
+	}
+
+	c.GTS.InteractionApproval.Init(structr.CacheConfig[*gtsmodel.InteractionApproval]{
+		Indices: []structr.IndexConfig{
+			{Fields: "ID"},
+			{Fields: "URI"},
+		},
+		MaxSize:   cap,
+		IgnoreErr: ignoreErrors,
+		Copy:      copyF,
+	})
+}
+
 func (c *Caches) initList() {
 	// Calculate maximum cache size.
 	cap := calculateResultCacheMax(
@@ -1188,6 +1224,7 @@ func (c *Caches) initStatusFave() {
 	c.GTS.StatusFave.Init(structr.CacheConfig[*gtsmodel.StatusFave]{
 		Indices: []structr.IndexConfig{
 			{Fields: "ID"},
+			{Fields: "URI"},
 			{Fields: "AccountID,StatusID"},
 			{Fields: "StatusID", Multiple: true},
 		},