Initial HerbAPI implementation

Rust/Axum REST API (herbapi-api) with PostgreSQL, S3/Garage, OIDC auth.
Dioxus 0.7 WASM frontend (herbapi-ui) with sidebar layout and botanical reference style.
9 SQL migrations covering families, species, cultivars, suppliers, companions, images, users, API tokens.

herbapi-api/migrations/005_create_scrape_log.sql

@@ -0,0 +1,12 @@
+CREATE TABLE scrape_log (
+    id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    source_name     TEXT NOT NULL,
+    entity_type     TEXT NOT NULL,
+    entity_id       UUID NOT NULL,
+    source_url      TEXT NOT NULL,
+    last_scraped_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    raw_data        JSONB
+);
+
+CREATE INDEX idx_scrape_entity ON scrape_log(entity_type, entity_id);
+CREATE INDEX idx_scrape_source ON scrape_log(source_name);