fix: bd doctor false positive for molecule/wisp prefix variants

The prefix mismatch check in bd doctor was reporting warnings when
issues were created via molecule workflows (bd mol pour), which
intentionally use a different prefix pattern (<base>-mol instead
of just <base>).

Added recognition of valid workflow prefix variants:
- <prefix>-mol (molecules from bd mol pour)
- <prefix>-wisp (ephemeral wisps)
- <prefix>-eph (ephemeral issues)

These are intentional prefix extensions for visual distinction, not
actual mismatches. The check now only warns for truly mismatched
prefixes (e.g., different project entirely).

Added comprehensive regression tests for all prefix variant cases.

Fixes #811

Generated with Claude Code

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

cmd/bd/doctor/database.go

@@ -480,8 +480,21 @@ func CheckDatabaseJSONLSync(path string) DoctorCheck {
 		}
 
 		// Only warn if majority of issues have wrong prefix
+		// BUT: recognize that <prefix>-mol and <prefix>-wisp are valid variants
+		// created by molecule/wisp workflows (see internal/storage/sqlite/queries.go:166-170)
 		if mostCommonPrefix != dbPrefix && maxCount > jsonlCount/2 {
-			issues = append(issues, fmt.Sprintf("Prefix mismatch: database uses %q but most JSONL issues use %q", dbPrefix, mostCommonPrefix))
+			// Check if the common prefix is a known workflow variant of the db prefix
+			isValidVariant := false
+			for _, suffix := range []string{"-mol", "-wisp", "-eph"} {
+				if mostCommonPrefix == dbPrefix+suffix {
+					isValidVariant = true
+					break
+				}
+			}
+
+			if !isValidVariant {
+				issues = append(issues, fmt.Sprintf("Prefix mismatch: database uses %q but most JSONL issues use %q", dbPrefix, mostCommonPrefix))
+			}
 		}
 	}