fix(ui): run paraglide compile in prepare so CI type-check finds $lib/paraglide/server

The paraglide output dir has its own .gitignore (ignores everything), so
generated files are never committed. CI ran `npm ci` then `svelte-check`
without ever invoking vite, so $lib/paraglide/server was missing at
type-check time.

Adding `paraglide-js compile` to the prepare script ensures the output is
regenerated during `npm ci` before svelte-kit sync and svelte-check run.

Also adds translation_jobs collection to pb-init-v3.sh.

scripts/pb-init-v3.sh

@@ -245,6 +245,20 @@ create "comment_votes" '{
     {"name":"vote",     "type":"text"}
   ]}'
 
+create "translation_jobs" '{
+  "name":"translation_jobs","type":"base","fields":[
+    {"name":"cache_key",    "type":"text",  "required":true},
+    {"name":"slug",         "type":"text",  "required":true},
+    {"name":"chapter",      "type":"number","required":true},
+    {"name":"lang",         "type":"text",  "required":true},
+    {"name":"worker_id",    "type":"text"},
+    {"name":"status",       "type":"text",  "required":true},
+    {"name":"error_message","type":"text"},
+    {"name":"started",      "type":"date"},
+    {"name":"finished",     "type":"date"},
+    {"name":"heartbeat_at", "type":"date"}
+  ]}'
+
 # ── 5. Field migrations (idempotent — adds fields missing from older installs) ─
 add_field "scraping_tasks" "heartbeat_at"           "date"
 add_field "audio_jobs"     "heartbeat_at"           "date"