Communications tab: show matched investors only (v0.1.0:81)

The email-activity panel surfaced every captured message, including cold/
unknown-sender email with no investor association. Gate query_email_activity
on EXISTS(email_investor_links) so the panel shows only email tied to a known
investor/contact. Capture is unchanged — unmatched email is still stored
(metadata-only) and will appear automatically if its sender is later added as
an investor; this is a read-side filter only.

Graveyard investors are unaffected (their email has a link), so they remain
visible/searchable as an audit surface, hidden only from the filter picker.

start9/0.4/startos/versions/v0.1.0.81.ts

@@ -0,0 +1,18 @@
+import { VersionInfo } from '@start9labs/start-sdk'
+
+// Communications tab is matched-only. Code-only, no schema change (migrations are no-ops):
+//   * query_email_activity now gates on EXISTS(email_investor_links), so the admin
+//     email-activity panel surfaces ONLY email that links to a known investor/contact.
+//     Unmatched cold/unknown-sender email is still captured (metadata-only) but never shown.
+//   * Graveyard investors are unaffected (their email has a link) — still hidden from the
+//     picker but visible/searchable as an audit surface.
+export const v_0_1_0_81 = VersionInfo.of({
+  version: '0.1.0:81',
+  releaseNotes: {
+    en_US: [
+      'The Communications tab now shows only email matched to a known investor or contact.',
+      'Unmatched cold/unknown-sender email is captured but no longer surfaced. No data changes.',
+    ].join(' '),
+  },
+  migrations: { up: async () => {}, down: async () => {} },
+})