fix: Use shared role beads consistently

All agent bead creation now uses shared role beads:
- gt-mayor-role, gt-deacon-role
- gt-witness-role, gt-refinery-role
- gt-crew-role, gt-polecat-role

Previous code created per-instance role bead references like
gt-witness-gastown-role which is wrong. Role beads are shared
class definitions, not per-instance.

Files fixed:
- internal/rig/manager.go
- internal/doctor/agent_beads_check.go
- internal/cmd/prime.go

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

internal/doctor/agent_beads_check.go

@@ -226,7 +226,7 @@ func (c *AgentBeadsCheck) Fix(ctx *CheckContext) error {
 				RoleType:   "witness",
 				Rig:        rigName,
 				AgentState: "idle",
-				RoleBead:   witnessID + "-role",
+				RoleBead:   "gt-witness-role",
 			}
 			desc := fmt.Sprintf("Witness for %s - monitors polecat health and progress.", rigName)
 			if _, err := bd.CreateAgentBead(witnessID, desc, fields); err != nil {
@@ -240,7 +240,7 @@ func (c *AgentBeadsCheck) Fix(ctx *CheckContext) error {
 				RoleType:   "refinery",
 				Rig:        rigName,
 				AgentState: "idle",
-				RoleBead:   refineryID + "-role",
+				RoleBead:   "gt-refinery-role",
 			}
 			desc := fmt.Sprintf("Refinery for %s - processes merge queue.", rigName)
 			if _, err := bd.CreateAgentBead(refineryID, desc, fields); err != nil {
@@ -257,7 +257,7 @@ func (c *AgentBeadsCheck) Fix(ctx *CheckContext) error {
 					RoleType:   "crew",
 					Rig:        rigName,
 					AgentState: "idle",
-					RoleBead:   crewID + "-role",
+					RoleBead:   "gt-crew-role",
 				}
 				desc := fmt.Sprintf("Crew worker %s in %s - human-managed persistent workspace.", workerName, rigName)
 				if _, err := bd.CreateAgentBead(crewID, desc, fields); err != nil {
@@ -274,7 +274,7 @@ func (c *AgentBeadsCheck) Fix(ctx *CheckContext) error {
 					RoleType:   "deacon",
 					Rig:        "",
 					AgentState: "idle",
-					RoleBead:   deaconID + "-role",
+					RoleBead:   "gt-deacon-role",
 				}
 				desc := "Deacon (daemon beacon) - receives mechanical heartbeats, runs town plugins and monitoring."
 				if _, err := bd.CreateAgentBead(deaconID, desc, fields); err != nil {
@@ -288,7 +288,7 @@ func (c *AgentBeadsCheck) Fix(ctx *CheckContext) error {
 					RoleType:   "mayor",
 					Rig:        "",
 					AgentState: "idle",
-					RoleBead:   mayorID + "-role",
+					RoleBead:   "gt-mayor-role",
 				}
 				desc := "Mayor - global coordinator, handles cross-rig communication and escalations."
 				if _, err := bd.CreateAgentBead(mayorID, desc, fields); err != nil {