fix(cli): coverage failures throw instead of returning a string

Returning the error text made ERROR:  exit 0 on failure. Throw
Wheels.CoverageFailed so the runtime maps it to a non-zero exit, matching the
typed-error convention used by every other write-side command. The finally
block still reverts instrumentation.

Signed-off-by: Peter Amiri <peter@alurium.com>

Author: bpamiri

cli/lucli/Module.cfc

@@ -846,7 +846,11 @@ component extends="modules.BaseModule" {
 			var rows = svc.$analyze(appRoot & "/app", coverage);
 			return svc.$report(rows, opts.top, instrumented, suite.status);
 		} catch (any e) {
-			return "Coverage run failed: " & e.message & " " & (e.detail ?: "");
+			throw(
+				type = "Wheels.CoverageFailed",
+				message = e.message,
+				detail = e.detail ?: ""
+			);
 		} finally {
 			svc.$revert(appRoot & "/app");
 		}