feat(crm): dedupe duplicates, fix deal titles, and add cleanup CLI

Merge duplicate companies/persons/deals by name, remove duplicate contact
info and opportunity members, and rename malformed " @ Company" titles.
Applications sync now avoids empty-position titles and duplicate members.

Co-authored-by: Cursor <cursoragent@cursor.com>

crm_normalize_test.go

@@ -0,0 +1,73 @@
+package onlyoffice
+
+import "testing"
+
+func TestNormalizeCompanyName(t *testing.T) {
+	tests := []struct {
+		in, want string
+	}{
+		{" contoso ", "contoso"},
+		{"Contoso", "contoso"},
+		{"Acme  Corp", "acme corp"},
+	}
+	for _, tc := range tests {
+		if got := NormalizeCompanyName(tc.in); got != tc.want {
+			t.Errorf("NormalizeCompanyName(%q) = %q, want %q", tc.in, got, tc.want)
+		}
+	}
+}
+
+func TestNormalizePersonKey(t *testing.T) {
+	if got := NormalizePersonKey(" Jane ", " Doe "); got != "jane doe" {
+		t.Fatalf("got %q", got)
+	}
+}
+
+func TestFixDealTitle(t *testing.T) {
+	tests := []struct {
+		in, want string
+	}{
+		{" @ contoso", "contoso"},
+		{"@ contoso", "contoso"},
+		{"@Acme", "Acme"},
+		{"Dev@Acme", "Dev @ Acme"},
+		{"Dev  @  Acme", "Dev @ Acme"},
+		{"Senior Dev @ Acme", "Senior Dev @ Acme"},
+		{"", ""},
+	}
+	for _, tc := range tests {
+		if got := FixDealTitle(tc.in); got != tc.want {
+			t.Errorf("FixDealTitle(%q) = %q, want %q", tc.in, got, tc.want)
+		}
+	}
+}
+
+func TestStripCompanySuffix(t *testing.T) {
+	if got := StripCompanySuffix("Dev @ Acme"); got != "Dev" {
+		t.Fatalf("got %q", got)
+	}
+	if got := StripCompanySuffix("Dev"); got != "Dev" {
+		t.Fatalf("got %q", got)
+	}
+}
+
+func TestContactInfoKey(t *testing.T) {
+	if got := ContactInfoKey("Email", "  A@B.COM "); got != "email|a@b.com" {
+		t.Fatalf("got %q", got)
+	}
+}
+
+func TestMemberDisplayKey(t *testing.T) {
+	if got := MemberDisplayKey(" contoso "); got != "contoso" {
+		t.Fatalf("got %q", got)
+	}
+}
+
+func TestDealTitleForApplication(t *testing.T) {
+	if got := DealTitleForApplication("", "contoso"); got != "contoso" {
+		t.Fatalf("got %q", got)
+	}
+	if got := DealTitleForApplication("Dev", "Acme"); got != "Dev @ Acme" {
+		t.Fatalf("got %q", got)
+	}
+}