Store cookie durations as max_age_seconds

Replace the free-form duration TEXT column with a nullable
max_age_seconds INTEGER on both cookies and cookie_patterns
tables. The SDK detector now sends raw seconds instead of
humanized strings, eliminating locale-dependent comparisons
in the pattern merge worker. Humanization happens at display
time in the widget and console UI.

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

pkg/server/api/console/v1/graphql/cookie_banner.graphql

@@ -200,7 +200,7 @@ type CookiePattern implements Node {
     pattern: String!
     matchType: CookiePatternMatchType!
     displayName: String!
-    duration: String!
+    maxAgeSeconds: Int
     description: String!
     source: CookieSource!
     cookieCount: Int! @goField(forceResolver: true)
@@ -243,7 +243,7 @@ type CookieBannerVersionCategory {
 
 type CookieBannerVersionCookie {
     name: String!
-    duration: String!
+    maxAgeSeconds: Int
     description: String!
 }
 
@@ -434,14 +434,14 @@ input CreateCookiePatternInput {
     pattern: String!
     matchType: CookiePatternMatchType!
     displayName: String!
-    duration: String!
+    maxAgeSeconds: Int
     description: String!
 }
 
 input UpdateCookiePatternInput {
     cookiePatternId: ID!
     displayName: String
-    duration: String
+    maxAgeSeconds: Int @goField(omittable: true)
     description: String
 }