feat: sync official star gift lifecycle tooling

Sync telesrv 4c0e2d9 (feat: complete official star gift lifecycle and admin tooling).

Public adjustments: skipped private docs/deploy-nginx/README source changes, kept iamxvbaba/td public dependency, replaced local/private sample IP and orange seed label.

deploy/migrations/0102_star_gift_purchase_forms.up.sql

@@ -0,0 +1,23 @@
+CREATE TABLE public.star_gift_purchase_forms (
+    buyer_user_id bigint NOT NULL,
+    form_id bigint NOT NULL,
+    gift_id bigint NOT NULL REFERENCES public.star_gift_catalog(gift_id) ON DELETE RESTRICT,
+    revision_id bigint NOT NULL REFERENCES public.star_gift_catalog_revisions(id) ON DELETE RESTRICT,
+    recipient_peer_type text NOT NULL,
+    recipient_peer_id bigint NOT NULL,
+    include_upgrade boolean DEFAULT false NOT NULL,
+    hide_name boolean DEFAULT false NOT NULL,
+    message text DEFAULT '' NOT NULL,
+    charge_stars bigint NOT NULL,
+    issued_at integer NOT NULL,
+    expires_at integer NOT NULL,
+    CONSTRAINT star_gift_purchase_forms_pkey PRIMARY KEY (buyer_user_id, form_id),
+    CONSTRAINT star_gift_purchase_form_shape_check CHECK (
+        buyer_user_id > 0 AND form_id <> 0 AND gift_id > 0 AND revision_id > 0 AND
+        recipient_peer_type IN ('user', 'channel') AND recipient_peer_id > 0 AND
+        charge_stars > 0 AND issued_at > 0 AND expires_at = issued_at + 600 AND
+        char_length(message) <= 128)
+);
+
+CREATE INDEX star_gift_purchase_forms_expiry_idx
+    ON public.star_gift_purchase_forms (expires_at, buyer_user_id, form_id);