fix(company-profile): deserialize JSONB columns in row_to_response

Raw text() queries return JSONB columns as JSON-encoded Python strings,
not as Python list/dict objects. The existing isinstance check then fails
and silently falls back to defaults — so list-valued fields like
target_markets, offerings, processing_systems, ai_systems were always
returned as their defaults regardless of stored content.

Add a JSON-decode pass over _JSONB_FIELDS before the type check.

Verified: PATCH of target_markets=["DE","EU"] now round-trips through
GET correctly. Previously the DB had the right data but GET returned
["DE"] (the default).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend-compliance/compliance/services/company_profile_service.py

@@ -109,7 +109,12 @@ def _where_clause() -> str:
 
 
 def row_to_response(row: Any) -> CompanyProfileResponse:
-    """Convert a DB row to response model using zip-based column mapping."""
+    """Convert a DB row to response model using zip-based column mapping.
+
+    JSONB columns may arrive as JSON strings from raw text() queries — we
+    json.loads them first so the isinstance check below succeeds against the
+    expected Python type.
+    """
     raw = dict(zip(_BASE_COLUMNS_LIST, row))
     coerced: dict[str, Any] = {}
 
@@ -117,6 +122,13 @@ def row_to_response(row: Any) -> CompanyProfileResponse:
         default, expected_type = _FIELD_DEFAULTS[col]
         value = raw[col]
 
+        # JSONB columns can come back as JSON-encoded strings from raw queries
+        if col in _JSONB_FIELDS and isinstance(value, str):
+            try:
+                value = json.loads(value)
+            except (json.JSONDecodeError, TypeError):
+                pass  # fall through to default below
+
         if expected_type == "STR":
             coerced[col] = str(value)
         elif expected_type == "STR_OR_NONE":