feat(live): add language-aware flexible channel search (#23)

Add backend language detection, flexible live channel search, iptv-org catalog caching, and protected built-in EPG source registration.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/db/liveProjectionSchema.js

@@ -36,6 +36,24 @@ const LIVE_PROJECTION_SCHEMA_SQL = `
     );
     CREATE INDEX IF NOT EXISTS idx_logical_channels_fingerprint ON logical_channels(fingerprint);
 
+    CREATE TABLE IF NOT EXISTS iptv_org_channels (
+        id TEXT PRIMARY KEY,
+        name TEXT NOT NULL,
+        normalized_name TEXT NOT NULL,
+        alt_names JSON NOT NULL DEFAULT '[]',
+        country TEXT,
+        languages JSON NOT NULL DEFAULT '[]',
+        data JSON,
+        updated_at INTEGER NOT NULL
+    );
+    CREATE INDEX IF NOT EXISTS idx_iptv_org_channels_name ON iptv_org_channels(normalized_name);
+
+    CREATE TABLE IF NOT EXISTS iptv_org_cache_state (
+        resource TEXT PRIMARY KEY,
+        refreshed_at INTEGER NOT NULL,
+        item_count INTEGER NOT NULL DEFAULT 0
+    );
+
     CREATE TABLE IF NOT EXISTS catalog_projection_state (
         projection TEXT PRIMARY KEY,
         status TEXT NOT NULL,