fix: default standard gyro/cockpit/myomer when MegaMek omits them

MegaMek doesn't store gyro_type/cockpit_type/myomer_type when they are
standard, leaving 3509 of 4225 mech rows with NULL FKs. Default to
standard component type in scraper and backfill existing rows via
migration. All three now at 100% match rate.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: graylikeme

crates/scraper/src/db.rs

@@ -303,15 +303,19 @@ pub async fn upsert_mech_data(
     let heatsink_type_id = if let Some(ref ht) = data.heat_sink_type {
         resolve_alias(pool, "heatsink_type_aliases", "heatsink_type_id", ht).await
     } else { None };
-    let gyro_type_id = if let Some(ref gt) = data.gyro_type {
+    // Default to standard gyro/cockpit/myomer when MegaMek omits the field
+    let gyro_type_id = {
+        let gt = data.gyro_type.as_deref().unwrap_or("Standard Gyro");
         resolve_alias(pool, "gyro_type_aliases", "gyro_type_id", gt).await
-    } else { None };
-    let cockpit_type_id = if let Some(ref ct) = data.cockpit_type {
+    };
+    let cockpit_type_id = {
+        let ct = data.cockpit_type.as_deref().unwrap_or("Standard Cockpit");
         resolve_alias(pool, "cockpit_type_aliases", "cockpit_type_id", ct).await
-    } else { None };
-    let myomer_type_id = if let Some(ref mt) = data.myomer_type {
+    };
+    let myomer_type_id = {
+        let mt = data.myomer_type.as_deref().unwrap_or("Standard");
         resolve_alias(pool, "myomer_type_aliases", "myomer_type_id", mt).await
-    } else { None };
+    };
 
     sqlx::query(
         r#"INSERT INTO unit_mech_data (

migrations/20260220000010_default_standard_components.sql

@@ -0,0 +1,15 @@
+-- Backfill standard gyro/cockpit/myomer FKs where MegaMek omitted the field.
+-- MegaMek doesn't store gyro_type/cockpit_type/myomer_type when they are standard,
+-- leaving them NULL. Default these to the standard component type.
+
+UPDATE unit_mech_data SET gyro_type_id = (
+    SELECT gyro_type_id FROM gyro_type_aliases WHERE alias = 'Standard Gyro'
+) WHERE gyro_type_id IS NULL;
+
+UPDATE unit_mech_data SET cockpit_type_id = (
+    SELECT cockpit_type_id FROM cockpit_type_aliases WHERE alias = 'Standard Cockpit'
+) WHERE cockpit_type_id IS NULL;
+
+UPDATE unit_mech_data SET myomer_type_id = (
+    SELECT myomer_type_id FROM myomer_type_aliases WHERE alias = 'Standard'
+) WHERE myomer_type_id IS NULL;