Accept contact.phone in the fundraising contact upsert (server half of card phone)

_upsert_contact_from_fundraising now reads contact.phone and writes contacts.phone on
both the insert and update paths, so a phone captured from a business card persists on
the canonical contact record. Phone stays contact-level (not a grid pill field),
matching how the team edits it. Validated by test_grid_add_investor.py.

This is the SERVER half of business-card phone capture, staged for the next s9pk
(version bump + build + install). The bot's phone extraction/card/payload lands in the
same deploy, so phone never shows on a card before the box can store it. NOT yet
built or installed to the box.

backend/test_grid_add_investor.py

@@ -161,6 +161,27 @@ def main():
               f"reminder linked to the new investor (got id={rem.get('investor_id')!r}, "
               f"name={rem.get('investor_name')!r})")
 
+        # ── card-intake contact fields land on the canonical contact (phone/city/linkedin) ──
+        #    The Matrix card flow sends these on the contact dict; the upsert must persist them.
+        print("\n[contact fields: phone + city + linkedin persist on the contact]")
+        st, d = _req(port, "POST", "/api/fundraising/log-communication", token, {
+            "investor_name": "MARA Holdings", "create_investor_if_missing": True,
+            "contact": {"name": "Doug Mellinger", "email": "doug@mara.example",
+                        "phone": "1.914.456.2146", "city": "New York",
+                        "linkedin_url": "linkedin.com/in/dougmellinger"},
+            "type": "note", "body": "from a business card", "append_note": True,
+        })
+        check(st == 201, f"create with contact fields -> 201 (got {st})")
+        c = _db()
+        crow = c.execute("SELECT phone, city, linkedin_url FROM contacts WHERE lower(email) = ?",
+                         ("doug@mara.example",)).fetchone()
+        c.close()
+        check(crow is not None, "contact row exists")
+        check(bool(crow) and crow[0] == "1.914.456.2146", f"phone persisted (got {crow[0] if crow else None!r})")
+        check(bool(crow) and crow[1] == "New York", f"city persisted (got {crow[1] if crow else None!r})")
+        check(bool(crow) and crow[2] == "linkedin.com/in/dougmellinger",
+              f"linkedin persisted (got {crow[2] if crow else None!r})")
+
         # ── unknown source_row_id is refused (guard) ──
         print("\n[guard: reminder on an unknown source_row_id -> 404]")
         st, _ = _req(port, "POST", "/api/reminders", token, {