feat(members): add full member bio, contact info, and service history

Lazy-enriches member profiles on first view via Congress.gov detail API.
Adds office address, phone, official website, congress.gov link, birth
year, terms history, leadership roles, and sponsored/cosponsored counts.
Includes DB migration 0007 for new member columns.

Co-Authored-By: Jack Levy

backend/app/services/congress_api.py

@@ -103,7 +103,7 @@ def parse_bill_from_api(data: dict, congress: int) -> dict:
 
 
 def parse_member_from_api(data: dict) -> dict:
-    """Normalize raw API member data into our model fields."""
+    """Normalize raw API member list data into our model fields."""
     terms = data.get("terms", {}).get("item", [])
     current_term = terms[-1] if terms else {}
     return {
@@ -118,3 +118,50 @@ def parse_member_from_api(data: dict) -> dict:
         "photo_url": data.get("depiction", {}).get("imageUrl"),
         "official_url": data.get("officialWebsiteUrl"),
     }
+
+
+def parse_member_detail_from_api(data: dict) -> dict:
+    """Normalize Congress.gov member detail response into enrichment fields."""
+    member = data.get("member", data)
+    addr = member.get("addressInformation") or {}
+    terms_raw = member.get("terms", [])
+    if isinstance(terms_raw, dict):
+        terms_raw = terms_raw.get("item", [])
+    leadership_raw = member.get("leadership") or []
+    if isinstance(leadership_raw, dict):
+        leadership_raw = leadership_raw.get("item", [])
+    first = member.get("firstName", "")
+    last = member.get("lastName", "")
+    bioguide_id = member.get("bioguideId", "")
+    slug = f"{first}-{last}".lower().replace(" ", "-").replace("'", "")
+    return {
+        "birth_year": str(member["birthYear"]) if member.get("birthYear") else None,
+        "address": addr.get("officeAddress"),
+        "phone": addr.get("phoneNumber"),
+        "official_url": member.get("officialWebsiteUrl"),
+        "photo_url": (member.get("depiction") or {}).get("imageUrl"),
+        "congress_url": f"https://www.congress.gov/member/{slug}/{bioguide_id}" if bioguide_id else None,
+        "terms_json": [
+            {
+                "congress": t.get("congress"),
+                "chamber": t.get("chamber"),
+                "partyName": t.get("partyName"),
+                "stateCode": t.get("stateCode"),
+                "stateName": t.get("stateName"),
+                "startYear": t.get("startYear"),
+                "endYear": t.get("endYear"),
+                "district": t.get("district"),
+            }
+            for t in terms_raw
+        ],
+        "leadership_json": [
+            {
+                "type": l.get("type"),
+                "congress": l.get("congress"),
+                "current": l.get("current"),
+            }
+            for l in leadership_raw
+        ],
+        "sponsored_count": (member.get("sponsoredLegislation") or {}).get("count"),
+        "cosponsored_count": (member.get("cosponsoredLegislation") or {}).get("count"),
+    }