fix: make tests resilient to project .beads/redirect

Tests were failing because beads.FindDatabasePath() follows the
project's .beads/redirect file, causing tests to find unexpected
databases. Fixed by:

- Setting BEADS_DIR in tests that need isolation from git repo detection
- Clearing BEADS_DIR in TestMain to prevent global contamination
- Updating migration test schema to include owner column

This ensures tests work correctly in crew directories that have
redirect files pointing to shared .beads directories.

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

Executed-By: beads/crew/dave
Rig: beads
Role: crew

cmd/bd/init_test.go

@@ -466,16 +466,27 @@ func TestInitNoDbMode(t *testing.T) {
 	// Reset global state
 	origDBPath := dbPath
 	origNoDb := noDb
-	defer func() { 
+	defer func() {
 		dbPath = origDBPath
 		noDb = origNoDb
 	}()
 	dbPath = ""
 	noDb = false
-	
+
 	tmpDir := t.TempDir()
 	t.Chdir(tmpDir)
 
+	// Set BEADS_DIR to prevent git repo detection from finding project's .beads
+	origBeadsDir := os.Getenv("BEADS_DIR")
+	os.Setenv("BEADS_DIR", filepath.Join(tmpDir, ".beads"))
+	defer func() {
+		if origBeadsDir != "" {
+			os.Setenv("BEADS_DIR", origBeadsDir)
+		} else {
+			os.Unsetenv("BEADS_DIR")
+		}
+	}()
+
 	// Initialize with --no-db flag
 	rootCmd.SetArgs([]string{"init", "--no-db", "--no-daemon", "--prefix", "test", "--quiet"})
 

cmd/bd/test_repo_beads_guard_test.go

@@ -29,6 +29,17 @@ func TestMain(m *testing.M) {
 		}
 	}()
 
+	// Clear BEADS_DIR to prevent tests from accidentally picking up the project's
+	// .beads directory via git repo detection when there's a redirect file.
+	// Each test that needs a .beads directory should set BEADS_DIR explicitly.
+	origBeadsDir := os.Getenv("BEADS_DIR")
+	os.Unsetenv("BEADS_DIR")
+	defer func() {
+		if origBeadsDir != "" {
+			os.Setenv("BEADS_DIR", origBeadsDir)
+		}
+	}()
+
 	if os.Getenv("BEADS_TEST_GUARD_DISABLE") != "" {
 		os.Exit(m.Run())
 	}

cmd/bd/worktree_daemon_test.go

@@ -86,6 +86,18 @@ func TestShouldDisableDaemonForWorktree(t *testing.T) {
 		// Reset git caches after changing directory (required for IsWorktree to re-detect)
 		git.ResetCaches()
 
+		// Set BEADS_DIR to the test's .beads directory to prevent
+		// git repo detection from finding the project's .beads
+		origBeadsDir := os.Getenv("BEADS_DIR")
+		os.Setenv("BEADS_DIR", mainDir+"/.beads")
+		defer func() {
+			if origBeadsDir != "" {
+				os.Setenv("BEADS_DIR", origBeadsDir)
+			} else {
+				os.Unsetenv("BEADS_DIR")
+			}
+		}()
+
 		// No sync-branch configured
 		os.Unsetenv("BEADS_SYNC_BRANCH")
 
@@ -217,6 +229,18 @@ func TestShouldAutoStartDaemonWorktreeIntegration(t *testing.T) {
 		// Reset git caches after changing directory
 		git.ResetCaches()
 
+		// Set BEADS_DIR to the test's .beads directory to prevent
+		// git repo detection from finding the project's .beads
+		origBeadsDir := os.Getenv("BEADS_DIR")
+		os.Setenv("BEADS_DIR", mainDir+"/.beads")
+		defer func() {
+			if origBeadsDir != "" {
+				os.Setenv("BEADS_DIR", origBeadsDir)
+			} else {
+				os.Unsetenv("BEADS_DIR")
+			}
+		}()
+
 		// Clear all daemon-related env vars
 		os.Unsetenv("BEADS_NO_DAEMON")
 		os.Unsetenv("BEADS_AUTO_START_DAEMON")