feat(deps): update beads to 0.49.1 with dolt server mode, claude-code to 2.1.30

beads:
- Pin to commit 93965b4a (last before Go 1.25.6 requirement)
- Build locally with corrected vendorHash (upstream default.nix is stale)
- Enables dolt server mode support (gt-1mf.3)

claude-code: 2.1.19 → 2.1.30

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

flake.nix

@@ -43,9 +43,9 @@
     };
 
     beads = {
-      # Pinned to 55e733c (v0.47.2) - uses Go 1.24.0 which is available in nixpkgs
-      # Later versions require Go 1.25.6 which isn't in nixpkgs-unstable yet
-      url = "github:steveyegge/beads/55e733c";
+      # v0.49.1 has dolt server mode support (gt-1mf.3)
+      # Pinned to 259ddd92 - uses Go 1.24 compatible with nixpkgs
+      url = "github:steveyegge/beads/93965b4abeed920a4701e03571d1b6bb75810722";
       inputs.nixpkgs.follows = "nixpkgs-unstable";
     };