Batch inserts [MOD-555] (#726)

* Batch a bunch of inserts, but still more to do

* Insert many for clickhouse (+ tests)

* Batch the remaining ones except those requiring deduplication

* Risky dedups

* Bit o cleanup and formatting

* cargo sqlx prepare

* Add test around batch editing project categories

* Add struct to satisfy clippy

* Fix silly mistake that was caught by the tests!

* Leave room for growth in dummy_data

tests/common/dummy_data.rs

@@ -13,6 +13,16 @@ use super::{
     environment::TestEnvironment,
 };
 
+pub const DUMMY_CATEGORIES: &'static [&str] = &[
+    "combat",
+    "decoration",
+    "economy",
+    "food",
+    "magic",
+    "mobs",
+    "optimization",
+];
+
 pub struct DummyData {
     pub alpha_team_id: String,
     pub beta_team_id: String,