feat: implement activity tracking with database models and queries

sqlc.yaml

@@ -0,0 +1,34 @@
+version: "2"
+sql:
+  # Activity DB - User to User Interactions
+  - engine: "sqlite"
+    queries: "./activity/sink/query.sql"
+    schema: "./activity/sink/schema.sql"
+    gen:
+      go:
+        emit_interface: true
+        emit_json_tags: true
+        package: "activity"
+        out: "./activity"
+
+  # Network DB - Blockchain Parameters and Asset Metadata
+  - engine: "sqlite"
+    queries: "./network/sink/query.sql"
+    schema: "./network/sink/schema.sql"
+    gen:
+      go:
+        emit_interface: true
+        emit_json_tags: true
+        package: "network"
+        out: "./network"
+
+  # Users DB - Accounts, Profiles, and Vault Metadata
+  - engine: "sqlite"
+    queries: "./users/sink/query.sql"
+    schema: "./users/sink/schema.sql"
+    gen:
+      go:
+        emit_interface: true
+        emit_json_tags: true
+        package: "users"
+        out: "./users"