style(core): apply cargo fmt across routes, services, models, tests

Pure rustfmt reflow (import grouping, array/match-arm/call-arg wrapping,
alphabetized module decls, comment realignment). No semantic change:
full-diff and `git diff -w` both confirm logic byte-identical to 271c363;
workspace builds and all 74 core tests pass. Retained pre-existing WIP
brought forward after verification.

src/models/mod.rs

@@ -1,19 +1,19 @@
 pub mod achievement;
 pub mod card;
 pub mod chemistry_style;
-pub mod notification;
 pub mod club;
 pub mod draft;
+pub mod event;
 pub mod fut_champs;
 pub mod game_ext;
-pub mod event;
-pub mod season;
 pub mod market;
 pub mod match_result;
+pub mod notification;
 pub mod objective;
 pub mod pack;
 pub mod profile;
 pub mod reward;
 pub mod sbc;
+pub mod season;
 pub mod squad;
 pub mod statistics;