fix(ready): use rig root for beads resolution, not mayor/rig

The ready command was using constants.RigMayorPath(r.Path) which returns
<rig>/mayor/rig, but this fails for rigs where the source repo doesn't
have tracked beads. In those cases, rig-level beads are stored at
<rig>/.beads directly.

Using r.Path (rig root) allows ResolveBeadsDir to properly handle both:
- Tracked beads: follows <rig>/.beads/redirect to mayor/rig/.beads
- Local beads: uses <rig>/.beads directly

Fixes "no beads database found" errors for google_cookie_retrieval and
home_assistant_blueprints rigs.

Closes: hq-c90jd

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

internal/cmd/ready.go

@@ -147,8 +147,10 @@ func runReady(cmd *cobra.Command, args []string) error {
 		wg.Add(1)
 		go func(r *rig.Rig) {
 			defer wg.Done()
-			// Use mayor/rig path where rig-level beads are stored
+			// Use rig root path - ResolveBeadsDir follows redirects to find actual beads.
-			rigBeadsPath := constants.RigMayorPath(r.Path)
+			// For tracked beads: <rig>/.beads/redirect -> mayor/rig/.beads
+			// For rig-local beads: <rig>/.beads directly
+			rigBeadsPath := r.Path
 			rigBeads := beads.New(rigBeadsPath)
 			issues, err := rigBeads.Ready()