feat(admin): persist provider drafts in crm

internal/store/migrations/0009_provider_drafts.sql

@@ -0,0 +1,19 @@
+CREATE TABLE provider_drafts (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    draft_id TEXT NOT NULL UNIQUE,
+    pack_id TEXT NOT NULL,
+    provider_id TEXT NOT NULL,
+    display_name TEXT NOT NULL,
+    platform TEXT NOT NULL DEFAULT '',
+    base_url TEXT NOT NULL DEFAULT '',
+    smoke_test_model TEXT NOT NULL DEFAULT '',
+    supported_models_json TEXT NOT NULL DEFAULT '[]',
+    manifest_json TEXT NOT NULL DEFAULT '{}',
+    source_host_id TEXT NOT NULL DEFAULT '',
+    notes TEXT NOT NULL DEFAULT '',
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX idx_provider_drafts_pack_id ON provider_drafts(pack_id);
+CREATE INDEX idx_provider_drafts_provider_id ON provider_drafts(provider_id);