Add bilingual native_range and wildlife_value fields (DE/EN) to species

Migration 011 adds native_range_de, native_range_en, wildlife_value_de,
wildlife_value_en columns. Backend INSERT/UPDATE queries updated ($64→$68).
Frontend species and cultivar detail pages use pick_desc() for language selection.

herbapi-api/src/db/models.rs

@@ -110,6 +110,8 @@ pub struct Species {
     pub other_uses_de: Option<String>,
     pub other_uses_en: Option<String>,
     pub native_range: Option<String>,
+    pub native_range_de: Option<String>,
+    pub native_range_en: Option<String>,
     pub invasiveness: Option<String>,
     pub pollination_type: Option<String>,
     pub plant_layer: Option<String>,
@@ -119,6 +121,8 @@ pub struct Species {
     pub attracts_pollinators: Option<bool>,
     pub attracts_beneficial_insects: Option<bool>,
     pub wildlife_value: Option<String>,
+    pub wildlife_value_de: Option<String>,
+    pub wildlife_value_en: Option<String>,
     pub mulch_plant: Option<bool>,
     pub ground_cover_quality: Option<String>,
     pub allelopathic: Option<bool>,
@@ -179,6 +183,8 @@ pub struct CreateSpecies {
     pub other_uses_de: Option<String>,
     pub other_uses_en: Option<String>,
     pub native_range: Option<String>,
+    pub native_range_de: Option<String>,
+    pub native_range_en: Option<String>,
     pub invasiveness: Option<String>,
     pub pollination_type: Option<String>,
     pub plant_layer: Option<String>,
@@ -188,6 +194,8 @@ pub struct CreateSpecies {
     pub attracts_pollinators: Option<bool>,
     pub attracts_beneficial_insects: Option<bool>,
     pub wildlife_value: Option<String>,
+    pub wildlife_value_de: Option<String>,
+    pub wildlife_value_en: Option<String>,
     pub mulch_plant: Option<bool>,
     pub ground_cover_quality: Option<String>,
     pub allelopathic: Option<bool>,