fix: version display, FileBrowser auto-login, nostr relay, UID mappings

Version per build:
- Health endpoint returns "1.2.0-alpha-{git_hash}" using GIT_HASH env
- CI passes git hash to cargo build

FileBrowser auto-login:
- filebrowser-client.ts: include CSRF token + credentials:include
- First-boot: generate random password, store at secrets/filebrowser/
- Set FileBrowser admin password to match after container creation

Nostr relay:
- Use docker.io/scsibug/nostr-rs-relay:0.9.0 (not in our registry)

UID mappings:
- Added electrumx (UID 1000), mysql-mempool, archy-btcpay-db, nextcloud-db

522 tests pass, Rust compiles clean.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/marketplace/marketplaceData.ts

@@ -412,7 +412,7 @@ export function getCuratedAppList(): MarketplaceApp[] {
       description: 'Run your own Nostr relay. Store your events locally, relay for friends, and publish over Tor. A sovereign relay for your sovereign node.',
       icon: '/assets/img/app-icons/nostr-rs-relay.svg',
       author: 'scsiblade',
-      dockerImage: `${REGISTRY}/nostr-rs-relay:0.9.0`,
+      dockerImage: 'docker.io/scsibug/nostr-rs-relay:0.9.0',
       manifestUrl: undefined,
       repoUrl: 'https://sr.ht/~gheartsfield/nostr-rs-relay/'
     },