feat(catalog): port oo catalog (scan/merge/match/apply) from legacy branch

The catalog feature (approved ASR-0014) was lost during the GitHub history
rewrite: the merge commit on main is empty and the code only survived on the
old gitea-history branches (no merge base with main). Port catalog/* and the
oo catalog CLI verbatim; drop the library-only applications package whose
Sync() created the 'Write application'/'Apply application'/'Send CV' CRM
task spam (23k+ tasks deleted 2026-08-18).

catalog/match_test.go

@@ -0,0 +1,26 @@
+package catalog
+
+import (
+	"testing"
+)
+
+func TestMatchAgainstOO_emailThenName(t *testing.T) {
+	// MatchAgainstOO needs a live client; unit-test the helpers used by matching.
+	c := map[string]any{
+		"id":        float64(42),
+		"isCompany": false,
+		"firstName": "Ada",
+		"lastName":  "Lovelace",
+		"email":     "ada@example.com",
+		"commonData": []any{
+			map[string]any{"infoType": "Email", "data": "ada.alt@example.com"},
+		},
+	}
+	if contactIDString(c) != "42" {
+		t.Fatal(contactIDString(c))
+	}
+	emails := contactEmails(c)
+	if len(emails) < 2 {
+		t.Fatalf("%v", emails)
+	}
+}