refactor: reorganize modules and add Linux build tooling

module/social/relation/internal/models/relation_match.go

@@ -0,0 +1,15 @@
+package models
+
+import "git.apinb.com/bsm-sdk/core/types"
+
+// RelationMatch records a recommended relationship between two identities.
+type RelationMatch struct {
+	types.Std_IICUDS
+	RelationIdentity  string `gorm:"column:relation_identity;type:varchar(36);not null;" json:"relation_identity"`
+	RecommendIdentity string `gorm:"column:recommend_identity;type:varchar(255);not null;" json:"recommend_identity"`
+}
+
+// TableName returns the backing relation table.
+func (*RelationMatch) TableName() string {
+	return "relation_match"
+}