Emit audit and SCIM log exports as CSV

JSONL was awkward in spreadsheets and SIEM imports. Write
tab-separated-friendly CSV with organization name on every row,
resolve audit actors to email or API key name, and enrich SCIM rows
with profile email and display name when available.

Signed-off-by: Cursor Agent <cursoragent@cursor.com>

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>

pkg/iam/log_export_csv_test.go

@@ -0,0 +1,58 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package iam
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestScimEmailFromUserName(t *testing.T) {
+	t.Parallel()
+
+	assert.Equal(t, "user@example.com", scimEmailFromUserName("user@example.com"))
+	assert.Equal(t, "", scimEmailFromUserName("not-an-email"))
+	assert.Equal(t, "", scimEmailFromUserName(""))
+}
+
+func TestScimDisplayNameFromJSON(t *testing.T) {
+	t.Parallel()
+
+	displayName := scimDisplayNameFromJSON(`{"displayName":"Jane Doe"}`)
+	require.Equal(t, "Jane Doe", displayName)
+
+	formatted := scimDisplayNameFromJSON(`{"name":{"formatted":"John Smith"}}`)
+	require.Equal(t, "John Smith", formatted)
+
+	givenFamily := scimDisplayNameFromJSON(`{"name":{"givenName":"John","familyName":"Smith"}}`)
+	require.Equal(t, "John Smith", givenFamily)
+
+	assert.Equal(t, "", scimDisplayNameFromJSON("not json"))
+}
+
+func TestUniqueNonEmptyStrings(t *testing.T) {
+	t.Parallel()
+
+	got := uniqueNonEmptyStrings([]string{"a", "A", "", "b", "a"})
+	assert.Equal(t, []string{"a", "b"}, got)
+}