feat: upstream generic workspace tooling (board-sync, crm audit, catalog names)

Promote the generic, reusable parts of the private oo-workspace into the
public library/CLI, so oo-workspace can shrink to business glue.

- board.go: Board types + (c *Client) SyncBoard — upsert project
  milestones/tasks by exact title from a YAML board (dry-run when
  apply=false). CLI: oo projects board-sync.
- crm_audit.go: OpportunityAudit + (c *Client) AuditOpportunities —
  file/task/member counts with a generic class (ok|dup|empty|junk-title).
  CLI: oo crm audit [--out].
- catalog/names.go: CleanPersonNames / GuessNameFromEmail /
  FormatProjectTitle (ported from oo-workspace).
- catalog: adopt the newer apply/match logic — name repair (never encode
  company in lastName), company grouping key, contact-info type
  normalization, preserve an already-applied oo_id. Keeps the local
  Address/OOProjects fields and the config-driven classifier.

Business-only oo-workspace commands (crm clean/migrate, folders, search)
deliberately stay private.

board_test.go

@@ -0,0 +1,70 @@
+package onlyoffice
+
+import "testing"
+
+func TestParseBoard(t *testing.T) {
+	b, err := ParseBoard([]byte(`
+projects:
+  - id: 13
+    name: Example
+    milestones:
+      - title: "[lq] Test"
+        deadline: "2026-01-15"
+        key: true
+        tasks:
+          - title: Draft
+            start: "2026-01-02"
+            deadline: "2026-01-10"
+            description: "…"
+`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(b.Projects) != 1 || b.Projects[0].ID != 13 {
+		t.Fatalf("projects: %+v", b.Projects)
+	}
+	ms := b.Projects[0].Milestones[0]
+	if ms.Title != "[lq] Test" || !ms.Key || ms.Deadline != "2026-01-15" {
+		t.Fatalf("milestone: %+v", ms)
+	}
+	if len(ms.Tasks) != 1 || ms.Tasks[0].Title != "Draft" || ms.Tasks[0].Start != "2026-01-02" {
+		t.Fatalf("task: %+v", ms.Tasks)
+	}
+}
+
+func TestParseBoardEmpty(t *testing.T) {
+	if _, err := ParseBoard([]byte("projects: []")); err == nil {
+		t.Fatal("expected error for empty board")
+	}
+}
+
+func TestBoardMilestoneIDs(t *testing.T) {
+	title := "[lq] Test"
+	id := int64(9)
+	got := boardMilestoneIDs([]*Milestone{{Title: &title, ID: &id}, nil})
+	if got[title] != 9 {
+		t.Fatalf("%v", got)
+	}
+}
+
+func TestBoardTaskTitles(t *testing.T) {
+	got := boardTaskTitles([]map[string]any{{"title": "a"}, {"title": "b"}, {"nope": 1}})
+	if _, ok := got["a"]; !ok {
+		t.Fatal("missing a")
+	}
+	if _, ok := got["b"]; !ok {
+		t.Fatal("missing b")
+	}
+	if len(got) != 2 {
+		t.Fatalf("%v", got)
+	}
+}
+
+func TestBoardDay(t *testing.T) {
+	if _, err := boardDay("2026-01-15"); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := boardDay("15.01.2026"); err == nil {
+		t.Fatal("expected error for non-ISO date")
+	}
+}