Fix context key type mismatch causing org files 500 error

- Export ContextKey type and context keys from middleware package
- Use exported keys (UserKey, SessionKey, TokenKey, OrgKey) in handlers
- Fixes panic: interface conversion: interface {} is nil, not uuid.UUID
- The middleware was setting context with contextKey type but handlers
  were retrieving with string type, causing nil value lookup failure

go_cloud/internal/middleware/middleware.go

@@ -64,30 +64,30 @@ var RateLimit = func(next http.Handler) http.Handler {
 	})
 }
 
-type contextKey string
+type ContextKey string
 
 const (
-	userKey    contextKey = "user"
-	sessionKey contextKey = "session"
-	tokenKey   contextKey = "token"
-	orgKey     contextKey = "org"
+	UserKey    ContextKey = "user"
+	SessionKey ContextKey = "session"
+	TokenKey   ContextKey = "token"
+	OrgKey     ContextKey = "org"
 )
 
 // GetUserID retrieves the user ID from the request context
 func GetUserID(ctx context.Context) (string, bool) {
-	userID, ok := ctx.Value(userKey).(string)
+	userID, ok := ctx.Value(UserKey).(string)
 	return userID, ok
 }
 
 // GetSession retrieves the session from the request context
 func GetSession(ctx context.Context) (*database.Session, bool) {
-	session, ok := ctx.Value(sessionKey).(*database.Session)
+	session, ok := ctx.Value(SessionKey).(*database.Session)
 	return session, ok
 }
 
 // GetToken retrieves the JWT token from the request context
 func GetToken(ctx context.Context) (string, bool) {
-	token, ok := ctx.Value(tokenKey).(string)
+	token, ok := ctx.Value(TokenKey).(string)
 	return token, ok
 }
 
@@ -108,9 +108,9 @@ func Auth(jwtManager *jwt.Manager, db *database.DB) func(http.Handler) http.Hand
 				return
 			}
 
-			ctx := context.WithValue(r.Context(), userKey, claims.UserID)
-			ctx = context.WithValue(ctx, sessionKey, session)
-			ctx = context.WithValue(ctx, tokenKey, tokenString)
+		ctx := context.WithValue(r.Context(), UserKey, claims.UserID)
+		ctx = context.WithValue(ctx, SessionKey, session)
+		ctx = context.WithValue(ctx, TokenKey, tokenString)
 			next.ServeHTTP(w, r.WithContext(ctx))
 		})
 	}
@@ -120,7 +120,7 @@ func Auth(jwtManager *jwt.Manager, db *database.DB) func(http.Handler) http.Hand
 func Org(db *database.DB, auditLogger *audit.Logger) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			userIDStr := r.Context().Value(userKey).(string)
+			userIDStr := r.Context().Value(UserKey).(string)
 			userID, _ := uuid.Parse(userIDStr)
 
 			orgIDStr := r.Header.Get("X-Org-ID")
@@ -159,7 +159,7 @@ func Org(db *database.DB, auditLogger *audit.Logger) func(http.Handler) http.Han
 				return
 			}
 
-			ctx := context.WithValue(r.Context(), orgKey, orgID)
+			ctx := context.WithValue(r.Context(), OrgKey, orgID)
 			next.ServeHTTP(w, r.WithContext(ctx))
 		})
 	}
@@ -169,9 +169,9 @@ func Org(db *database.DB, auditLogger *audit.Logger) func(http.Handler) http.Han
 func Permission(db *database.DB, auditLogger *audit.Logger, perm permission.Permission) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			userIDStr := r.Context().Value(userKey).(string)
+			userIDStr := r.Context().Value(UserKey).(string)
 			userID, _ := uuid.Parse(userIDStr)
-			orgID := r.Context().Value(orgKey).(uuid.UUID)
+			orgID := r.Context().Value(OrgKey).(uuid.UUID)
 
 			hasPerm, err := permission.HasPermission(r.Context(), db, userID, orgID, perm)
 			if err != nil || !hasPerm {