feat: a held album below the quality you settle for, or holding a video rip, stays wanted for a better copy, and the import replaces the old tracks with their likes and plays carried over (M502 #5524)

- acquisition_settings.upgrade_until (default High quality lossy, Lidarr's
  cutoff, note #5527; "" is off), an "Upgrade until" row under Searching.
- The wanted worker judges held albums hourly: tier per format from size per
  second (the scanner records no bitrate), the album's worst. Below the
  cutoff it is wanted for quality; a video rip among its tracks always.
- The schedule searches upgrades weekly, after open wants; a release no
  better than the copy held is refused ("not_better").
- The import matches each file to the track it would replace (recording,
  then disc/track) and replaces it when it is a rip or the file is a better
  tier: over the same path in one rename, or filed beside it and the old
  track folded in (library.ReplaceTrack: file first, then foldTrackInto).
  Nothing better: the release is set aside.
- Collection › Upgrades (Lidarr's Cutoff Unmet); Suspect sources says when a
  clean copy was looked for instead of Lidarr's search.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/acquire/search_test.go

@@ -95,7 +95,7 @@ func TestFor_ProfileSeedersAndDoubt(t *testing.T) {
 
 func TestFor_BlockedReleasesAreSetAside(t *testing.T) {
 	c := Candidate{Release: release.Parse("Daft Punk - Random Access Memories [FLAC]"), InfoHash: "aaaa", Seeders: 3}
-	decide(&c, ram.Want, anyQuality, map[string]string{"aaaa": "You set this release aside."})
+	decide(&c, ram, anyQuality, map[string]string{"aaaa": "You set this release aside."})
 	if c.Verdict != Blocked || c.Reason != "You set this release aside." {
 		t.Errorf("verdict %s %q", c.Verdict, c.Reason)
 	}
@@ -239,3 +239,25 @@ func TestLandingFor_OneFolderPerTorrent(t *testing.T) {
 		t.Error(got)
 	}
 }
+
+func TestDecide_AnUpgradeTakesOnlyABetterCopy(t *testing.T) {
+	up := ram
+	up.Floor, up.Held = release.TierLossyLow, "MP3, about 192 kbps"
+	same := Candidate{Release: release.Parse("Daft Punk - Random Access Memories [MP3 192]"), InfoHash: "aaaa", Seeders: 3}
+	decide(&same, up, anyQuality, nil)
+	if same.Verdict != Refused || same.Reasons[0].Code != CodeNotBetter ||
+		same.Reason != "No better than the copy you have (MP3, about 192 kbps)." {
+		t.Errorf("same quality: %s %q", same.Verdict, same.Reason)
+	}
+	flac := Candidate{Release: release.Parse("Daft Punk - Random Access Memories [FLAC]"), InfoHash: "bbbb", Seeders: 3}
+	decide(&flac, up, anyQuality, nil)
+	if flac.Verdict != Grab {
+		t.Errorf("a FLAC over a 192 MP3: %s %q", flac.Verdict, flac.Reason)
+	}
+	// A video rip has no floor: any clean copy is better.
+	rip := ram
+	decide(&same, rip, anyQuality, nil)
+	if same.Verdict != Grab {
+		t.Errorf("no floor: %s %q", same.Verdict, same.Reason)
+	}
+}