feat: add user profile management with update and retrieval endpoints, enhance database setup for testing

thoughts-backend/models/src/params/user.rs

@@ -9,3 +9,26 @@ pub struct CreateUserParams {
     #[validate(length(min = 6))]
     pub password: String,
 }
+
+#[derive(Deserialize, Validate, ToSchema, Default)]
+pub struct UpdateUserParams {
+    #[validate(length(max = 50))]
+    #[schema(example = "Frutiger Aero Fan")]
+    pub display_name: Option<String>,
+
+    #[validate(length(max = 160))]
+    #[schema(example = "Est. 2004")]
+    pub bio: Option<String>,
+
+    #[validate(url)]
+    pub avatar_url: Option<String>,
+
+    #[validate(url)]
+    pub header_url: Option<String>,
+
+    pub custom_css: Option<String>,
+
+    #[validate(length(max = 8))]
+    #[schema(example = json!(["username1", "username2"]))]
+    pub top_friends: Option<Vec<String>>,
+}