feat: rename Docker Watcher to Tinyforge

Rebrand the project as Tinyforge to reflect its evolution from a Docker
container watcher into a self-hosted mini CI/deployment platform.

Rename covers: Go module path, Docker labels, DB/config filenames,
JWT issuer, Dockerfile binary, docker-compose, CI workflows, frontend
i18n, README with static sites docs, and all code comments.

web/src/lib/components/ContainerStats.svelte

@@ -19,8 +19,11 @@
 
 	$effect(() => {
 		let cancelled = false;
+		let inflight = false;
 
 		async function load() {
+			if (inflight) return; // Skip if previous request still pending.
+			inflight = true;
 			try {
 				const result = await api.fetchContainerStats(projectId, stageId, instanceId);
 				if (!cancelled) {
@@ -31,13 +34,15 @@
 				if (!cancelled) {
 					error = true;
 				}
+			} finally {
+				inflight = false;
 			}
 		}
 
 		load();
 
-		// Poll every 10 seconds.
-		const interval = setInterval(load, 10_000);
+		// Poll every 30 seconds (reduced from 10s to limit concurrent connections).
+		const interval = setInterval(load, 30_000);
 
 		return () => {
 			cancelled = true;