feat: complete catalog-driven preprocessing

backend/test/catalog-description-generation-routes.test.ts

@@ -577,7 +577,7 @@ test("generates one selected Catalog Column from a single JSON code fence", asyn
       expect.objectContaining({
         sequence: 3,
         level: "info",
-        message: `Generated description for Catalog Column ${column.id}.`,
+        message: 'Generated description for Column "patients.birth_date".',
       }),
       expect.objectContaining({ sequence: 4, level: "info", message: "Description generation completed." }),
     ]);
@@ -934,7 +934,10 @@ test("generates selected Catalog Columns in caller order through sequential batc
     const events = await repository.listDescriptionGenerationEvents(run.id);
     expect(events.map((event) => event.sequence)).toEqual(Array.from({ length: 14 }, (_, index) => index + 1));
     expect(events.slice(2, -1).map((event) => event.message)).toEqual(
-      orderedIds.map((targetId) => `Generated description for Catalog Column ${targetId}.`),
+      orderedIds.map((targetId) => {
+        const target = columns.find((column) => column.id === targetId)!;
+        return `Generated description for Column "patients.${target.name}".`;
+      }),
     );
   } finally {
     pending[0]!.resolve(responseFor(orderedIds.slice(0, 10), 0));
@@ -1803,7 +1806,9 @@ test("retains completed batch writes when a later batch response is malformed",
     });
     const events = await repository.listDescriptionGenerationEvents(run.id);
     expect(events.slice(2, 12).map((event) => event.message)).toEqual(
-      orderedIds.slice(0, 10).map((targetId) => `Generated description for Catalog Column ${targetId}.`),
+      originalColumns.slice(0, 10).map(
+        (target) => `Generated description for Column "patients.${target.name}".`,
+      ),
     );
     expect(events.find((event) => event.level === "warning" && event.message.includes("Retrying batch"))).toEqual(
       expect.objectContaining({
@@ -1812,7 +1817,7 @@ test("retains completed batch writes when a later batch response is malformed",
     );
     expect(events.find((event) => event.level === "error")).toEqual(expect.objectContaining({
       level: "error",
-      message: `The model response did not match the required schema. Affected Catalog Column target: ${orderedIds[10]}.`,
+      message: `The model response did not match the required schema. Affected target: Column "patients.${originalColumns[10]!.name}".`,
     }));
   } finally {
     await app.close();
@@ -2301,7 +2306,7 @@ test("generates selected Catalog Tables with structural column context and local
     expect((await repository.listDescriptionGenerationEvents(run.id)).map((event) => event.message)).toEqual([
       "Description generation queued.",
       "Description generation started.",
-      `Stored non-generatable result for Catalog Table ${table.id}.`,
+      'Stored non-generatable result for Table "patients".',
       "Description generation completed.",
     ]);
   } finally {
@@ -2445,7 +2450,7 @@ test("fails safely when the provider fails and redacts provider diagnostics", as
     expect(`${JSON.stringify(run)}${events.body}`).not.toContain(sensitiveDiagnostic);
     expect(events.json().find((event: { level: string }) => event.level === "error")).toEqual(expect.objectContaining({
       level: "error",
-      message: `The model provider request failed. Affected Catalog Column target: ${column.id}.`,
+      message: 'The model provider request failed. Affected target: Column "patients.birth_date".',
     }));
   } finally {
     await app.close();
@@ -2536,7 +2541,7 @@ test.each([
     expect((await repository.listDescriptionGenerationEvents(run.id)).find((event) => event.level === "error")).toEqual(
       expect.objectContaining({
         level: "error",
-        message: `${failureMessage} Affected Catalog Column targets: ${selectedColumnIds.join(", ")}.`,
+        message: `${failureMessage} Affected targets: Column "patients.first_column", Column "patients.second_column".`,
       }),
     );
   } finally {