internal/pkg: report errors exiting cure

This makes ongoing errors more obvious when multiple failures occur.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/pkg.go

@@ -1923,6 +1923,9 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 		}
 		c.exitCure(a, curesExempt)
 		if err != nil {
+			if c.msg.IsVerbose() {
+				c.msg.Verbosef("cure file %s: %v", reportName(f, id), err)
+			}
 			return
 		}
 
@@ -1966,6 +1969,9 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 		err = ca.Cure(&t)
 		c.exitCure(a, curesExempt)
 		if err != nil {
+			if c.msg.IsVerbose() {
+				c.msg.Verbosef("cure trivial %s: %v", reportName(ca, id), err)
+			}
 			return
 		}
 		break
@@ -2053,6 +2059,9 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 		}
 		c.exitCure(a, curesExempt)
 		if err != nil {
+			if c.msg.IsVerbose() {
+				c.msg.Verbosef("cure %s: %v", reportName(ca, id), err)
+			}
 			return
 		}
 		break