Add banner ID to probo_consent cookie

Include a `bid` field in the consent cookie so it explicitly
identifies which cookie banner it belongs to, making validation
direct instead of relying on the visitor ID as an implicit
discriminator. Existing cookies without `bid` self-heal on the
next load by falling through to the API fetch.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/cookiebanner/service.go

@@ -110,6 +110,7 @@ type (
 		UserAgent      *string
 		ConsentData    json.RawMessage
 		Action         coredata.CookieConsentAction
+		SdkVersion     string
 	}
 
 	RecordConsentRequest struct {
@@ -119,6 +120,7 @@ type (
 		UserAgent   *string
 		ConsentData json.RawMessage
 		Action      coredata.CookieConsentAction
+		SdkVersion  string
 	}
 
 	DetectedCookie struct {
@@ -1675,6 +1677,7 @@ func (s *Service) CreateCookieConsentRecord(
 				UserAgent:             req.UserAgent,
 				ConsentData:           req.ConsentData,
 				Action:                req.Action,
+				SdkVersion:            req.SdkVersion,
 				CreatedAt:             time.Now(),
 			}
 
@@ -2060,6 +2063,7 @@ func (s *Service) RecordConsent(
 				UserAgent:             req.UserAgent,
 				ConsentData:           req.ConsentData,
 				Action:                req.Action,
+				SdkVersion:            req.SdkVersion,
 				CreatedAt:             time.Now(),
 			}