PUBG drop map: live squad map with WebSocket rooms

- server.js wraps Bun.serve to add /ws/<channel> upgrades (same server and port) and
  serve the map tiles from the host mount; Dockerfile now runs bun ./server.js
- ws hub (channel registry, origin check) + pubg-map channel: rooms by unguessable
  code, validated + rate-limited messages, per-room write queue, presence
- games.pubg_rooms / pubg_matches / pubg_markers; per-match sessions with history
- /trackers/games/pubg/map hub (owner: rooms, landings over time, history) and
  /trackers/games/pubg/map/<code> fullscreen Leaflet map (all 11 maps)
- deploy-remote.sh bind-mounts ~/pubg-maps; scripts/build-pubg-tiles.py rebuilds it

drizzle/20261025223611_pubg_map/migration.sql

@@ -0,0 +1,37 @@
+CREATE TABLE "games"."pubg_markers" (
+	"id" text PRIMARY KEY,
+	"match_id" integer NOT NULL,
+	"kind" text NOT NULL,
+	"x" double precision NOT NULL,
+	"y" double precision NOT NULL,
+	"x2" double precision,
+	"y2" double precision,
+	"label" text,
+	"player" text NOT NULL,
+	"color" text NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "games"."pubg_matches" (
+	"id" serial PRIMARY KEY,
+	"room_id" integer NOT NULL,
+	"number" integer NOT NULL,
+	"map" text NOT NULL,
+	"started_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"ended_at" timestamp with time zone
+);
+--> statement-breakpoint
+CREATE TABLE "games"."pubg_rooms" (
+	"id" serial PRIMARY KEY,
+	"code" text NOT NULL UNIQUE,
+	"name" text NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE INDEX "pubg_markers_match_idx" ON "games"."pubg_markers" ("match_id");--> statement-breakpoint
+CREATE UNIQUE INDEX "pubg_matches_room_number_idx" ON "games"."pubg_matches" ("room_id","number");--> statement-breakpoint
+CREATE INDEX "pubg_matches_map_idx" ON "games"."pubg_matches" ("map","started_at");--> statement-breakpoint
+ALTER TABLE "games"."pubg_markers" ADD CONSTRAINT "pubg_markers_match_id_pubg_matches_id_fkey" FOREIGN KEY ("match_id") REFERENCES "games"."pubg_matches"("id") ON DELETE CASCADE;--> statement-breakpoint
+ALTER TABLE "games"."pubg_matches" ADD CONSTRAINT "pubg_matches_room_id_pubg_rooms_id_fkey" FOREIGN KEY ("room_id") REFERENCES "games"."pubg_rooms"("id") ON DELETE CASCADE;