feat: initial implementation of grasp-mirror daemon

GRASP mirror daemon that discovers repos from watched npubs and mirrors
git data + Nostr events across all known GRASP servers for redundancy.

Features:
- Configurable npub watch list via .env (MIRROR_NPUBS)
- TOML config for GRASP server list, index relays, storage paths
- NIP-11 verification of GRASP servers on startup
- Discovery of repos via kind:30617 announcements on index relays
- Git mirroring (bare clone + push --mirror) to missing GRASP servers
- Nostr event forwarding to all GRASP server embedded relays
- SQLite state tracking for sync status and event dedup
- Optional signing key for updating announcements with new clone URLs
- CLI subcommands: daemon, status, verify, mirror-once

Architecture:
  config.rs    - TOML + .env config loading
  db.rs        - SQLite state tracking
  health.rs    - NIP-11 GRASP server verification
  discovery.rs - Relay subscription, kind:30617 parsing
  git_mirror.rs - Bare clone + push to GRASP servers
  nostr_mirror.rs - Event forwarding to all GRASP relays
  signing.rs   - Optional announcement updates
  main.rs      - CLI entry point, daemon loop

1 files changed, 5 insertions, 0 deletions

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..e9ef332
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,5 @@
+# Comma-separated list of npubs (bech32 or hex) to mirror
+MIRROR_NPUBS=npub12m5exm2uk3xa674cc5r0hlyvccs5xxn7qv83ezuteefv5972nquq4j4szl
+
+# Optional: nsec for signing updated announcements
+# MIRROR_NSEC=