fix: doctor checks follow redirect for Gas Town support (bd-tvus)

Extended bd-tvus fix to all doctor check functions that access .beads/
directory. In Gas Town multi-clone setups, crew/polecat clones use
.beads/redirect files to point to the shared mayor/rig beads directory.

Doctor checks now use resolveBeadsDir() to follow these redirects:
- daemon.go: CheckDaemonStatus
- git.go: CheckSyncBranchConfig, FindOrphanedIssues, CheckOrphanedIssues
- installation.go: CheckMultipleDatabases, CheckPermissions
- integrity.go: CheckIDFormat, CheckDependencyCycles, CheckTombstones,
  CheckDeletionsManifest, CheckRepoFingerprint
- jsonl_integrity.go: CheckJSONLIntegrity
- legacy.go: CheckFreshClone
- maintenance.go: CheckStaleClosedIssues, CheckExpiredTombstones,
  CheckCompactionCandidates
- perf.go: RunPerformanceDiagnostics, CollectPlatformInfo
- validation.go: CheckMergeArtifacts, CheckOrphanedDependencies,
  CheckDuplicateIssues, CheckTestPollution, CheckChildParentDependencies,
  CheckGitConflicts
- version.go: CheckMetadataVersionTracking

Intentionally NOT changed (check local files):
- CheckInstallation: checks local .beads/ exists
- CheckUntrackedBeadsFiles: checks git tracking of local files

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

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

cmd/bd/doctor/perf.go

@@ -21,7 +21,8 @@ func RunPerformanceDiagnostics(path string) {
 	fmt.Println(strings.Repeat("=", 50))
 
 	// Check if .beads directory exists
-	beadsDir := filepath.Join(path, ".beads")
+	// Follow redirect to resolve actual beads directory (bd-tvus fix)
+	beadsDir := resolveBeadsDir(filepath.Join(path, ".beads"))
 	if _, err := os.Stat(beadsDir); os.IsNotExist(err) {
 		fmt.Fprintf(os.Stderr, "Error: No .beads/ directory found at %s\n", path)
 		fmt.Fprintf(os.Stderr, "Run 'bd init' to initialize beads\n")
@@ -107,7 +108,8 @@ func CollectPlatformInfo(path string) map[string]string {
 	info["go_version"] = runtime.Version()
 
 	// SQLite version - try to find database
-	beadsDir := filepath.Join(path, ".beads")
+	// Follow redirect to resolve actual beads directory (bd-tvus fix)
+	beadsDir := resolveBeadsDir(filepath.Join(path, ".beads"))
 	dbPath := filepath.Join(beadsDir, beads.CanonicalDatabaseName)
 	db, err := sql.Open("sqlite3", "file:"+dbPath+"?mode=ro")
 	if err == nil {