feat: Implement automatic token refresh for all auth-required methods

Add proactive token validation to all 142 authentication-required methods
across the ATProtoKit library. This prevents ExpiredToken errors by
automatically refreshing tokens before API calls when they are expired.

Implementation adds ensureValidToken() call before retrieving access tokens
in all auth-required methods including:
- Feed, Notification, and Graph methods
- Record operations (create, update, delete)
- ComAtproto server and identity methods
- AppBsky unspecced methods
- Admin and moderator methods
- Tools methods

This completes the automatic token refresh feature, ensuring seamless
user experience without manual token management.

Author: P24L

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/AddMemberAsAdmin.swift

@@ -40,6 +40,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/AddValuesAsAdmin.swift

@@ -29,6 +29,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/AdminSearchAccountsAsAdmin.swift

@@ -45,6 +45,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/CreateCommunicationTemplateAsAdmin.swift

@@ -47,6 +47,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/DeleteAccountAsAdmin.swift

@@ -34,6 +34,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/DeleteCommunicationTemplateAsAdmin.swift

@@ -33,6 +33,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/DeleteMemberAsAdmin.swift

@@ -34,6 +34,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/DeleteSetAsAdmin.swift

@@ -32,6 +32,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/DeleteValuesAsAdmin.swift

@@ -36,6 +36,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,

Sources/ATProtoKit/APIReference/AdminAndModeratorAPI/DisableAccountInvitesAsAdmin.swift

@@ -39,6 +39,7 @@ extension ATProtoAdmin {
             throw ATRequestPrepareError.missingActiveSession
         }
 
+        try await sessionConfiguration?.ensureValidToken()
         let accessToken = try await keychain.retrieveAccessToken()
 
         guard let sessionURL = session.pdsURL,