release(v1.7.31-alpha): idempotent IndeedHub install + auto-merge default mirrors/registries + 3rd OVH update mirror

- Backend: install.rs registry reachability probe now strips the
  `host[:port]/namespace` suffix before appending `/v2/` (the Docker
  V2 API lives at the host root, not under the namespace) and accepts
  HTTP 405 in addition to 200/401 as "registry daemon alive". This
  fixes false "unreachable" reports on the Test button for Gitea and
  other registries that protect their /v2/ endpoint.
- Backend: stacks.rs install_indeedhub_stack now force-removes any
  leftover indeedhub-* containers and indeedhub-net before creating
  the stack. A partial install (or the old first-boot stub racing the
  installer) used to leave containers around that blocked re-install
  with "name already in use". Re-running the App Store install now
  self-heals.
- Backend: registry.rs load_registries auto-merges any default
  registry URLs missing from the saved config (appended with priority
  max+10+i, persisted). Lets new default mirrors (e.g. Server 3 OVH)
  roll out to existing nodes without manual config edits. Explicit
  removals still stick — URLs absent from disk AND absent from
  defaults stay gone.
- Backend: update.rs adds DEFAULT_TERTIARY_MIRROR_URL at
  http://146.59.87.168:3000/ (Server 3 OVH) to default_mirrors, with
  the same auto-merge-on-load behavior as registries. Test updated
  for 3-mirror default (.160, tx1138, .168).
- Scripts: dropped the first-boot IndeedHub stub (~38 lines in
  first-boot-containers.sh §8b). It predated the proper stack
  installer, raced it, and was the main source of the name-conflict
  mess the stacks.rs cleanup above now also guards against.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

core/archipelago/src/api/rpc/package/install.rs

@@ -1589,10 +1589,16 @@ server {
             .and_then(|v| v.as_bool())
             .unwrap_or(true);
 
+        // Registries are configured as `host[:port]/namespace` (for
+        // example `23.182.128.160:3000/lfg2025`), but the Docker V2
+        // registry API lives at `/v2/` on the ROOT of the host — NOT
+        // under the namespace. Strip the namespace before appending
+        // `/v2/` so the reachability probe hits the correct URL.
+        let host = url.split('/').next().unwrap_or(url);
         let test_url = if tls_verify {
-            format!("https://{}/v2/", url)
+            format!("https://{}/v2/", host)
         } else {
-            format!("http://{}/v2/", url)
+            format!("http://{}/v2/", host)
         };
 
         let client = reqwest::Client::builder()
@@ -1604,8 +1610,11 @@ server {
         match client.get(&test_url).send().await {
             Ok(resp) => {
                 let status = resp.status().as_u16();
-                // 200 = open registry, 401 = auth required (both mean it exists)
-                let reachable = status == 200 || status == 401;
+                // Accept any "the server responded to HTTP" code as
+                // reachable — 200 (open registry), 401 (auth required),
+                // or 405 (server rejects GET but the endpoint exists)
+                // all mean the registry daemon is alive on the host.
+                let reachable = status == 200 || status == 401 || status == 405;
                 Ok(serde_json::json!({
                     "url": url,
                     "reachable": reachable,

core/archipelago/src/api/rpc/package/stacks.rs

@@ -937,6 +937,31 @@ impl RpcHandler {
                 .with_context(|| format!("Failed to pull IndeedHub image: {}", img))?;
         }
 
+        // Remove any leftover containers from a previous partial install (or
+        // from the first-boot frontend stub that used to race the installer).
+        // Without this, `podman run --name indeedhub` fails on name conflict
+        // and the whole stack install errors out — leaving a half-broken node.
+        for name in [
+            "indeedhub",
+            "indeedhub-postgres",
+            "indeedhub-redis",
+            "indeedhub-minio",
+            "indeedhub-relay",
+            "indeedhub-api",
+            "indeedhub-ffmpeg",
+            "indeedhub-build_api_1",
+            "indeedhub-build_ffmpeg-worker_1",
+        ] {
+            let _ = tokio::process::Command::new("podman")
+                .args(["rm", "-f", name])
+                .status()
+                .await;
+        }
+        let _ = tokio::process::Command::new("podman")
+            .args(["network", "rm", "-f", "indeedhub-net"])
+            .status()
+            .await;
+
         // Create indeedhub-net
         let _ = tokio::process::Command::new("podman")
             .args(["network", "create", "indeedhub-net"])