test(geschichte): add documentId, limit and status routing tests to GeschichteControllerTest

Adds list_passesDocumentIdFilterToService, list_passesLimitToService and
list_passesStatusFilterToService — characterisation tests for existing
parameter routing that had no controller-level coverage (refs #794).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/src/test/java/org/raddatz/familienarchiv/geschichte/GeschichteControllerTest.java

@@ -100,6 +100,43 @@ class GeschichteControllerTest {
         verify(geschichteService).list(any(), eq(List.of(a, b)), any(), anyInt());
     }
 
+    @Test
+    @WithMockUser(authorities = "READ_ALL")
+    void list_passesDocumentIdFilterToService() throws Exception {
+        UUID documentId = UUID.randomUUID();
+        when(geschichteService.list(any(), any(), eq(documentId), anyInt()))
+                .thenReturn(List.of());
+
+        mockMvc.perform(get("/api/geschichten").param("documentId", documentId.toString()))
+                .andExpect(status().isOk());
+
+        verify(geschichteService).list(any(), any(), eq(documentId), anyInt());
+    }
+
+    @Test
+    @WithMockUser(authorities = "READ_ALL")
+    void list_passesLimitToService() throws Exception {
+        when(geschichteService.list(any(), any(), any(), eq(5)))
+                .thenReturn(List.of());
+
+        mockMvc.perform(get("/api/geschichten").param("limit", "5"))
+                .andExpect(status().isOk());
+
+        verify(geschichteService).list(any(), any(), any(), eq(5));
+    }
+
+    @Test
+    @WithMockUser(authorities = "READ_ALL")
+    void list_passesStatusFilterToService() throws Exception {
+        when(geschichteService.list(eq(GeschichteStatus.PUBLISHED), any(), any(), anyInt()))
+                .thenReturn(List.of());
+
+        mockMvc.perform(get("/api/geschichten").param("status", "PUBLISHED"))
+                .andExpect(status().isOk());
+
+        verify(geschichteService).list(eq(GeschichteStatus.PUBLISHED), any(), any(), anyInt());
+    }
+
     // ─── GET /api/geschichten/{id} ───────────────────────────────────────────
 
     @Test