feat(cdc): accept + forward source columns on /inputs/cdc

Adds CdcColumnReq {name, type, is_primary_key} and columns? on
CdcTableReq, forwarded through createCdc and the addTable (Edit
Objects add-table) path so the column schema reaches in-factory for
Iceberg deduped-table pre-create. Bumps protospack-v2 to
3.41.0-cdc-iceberg.1, which adds the matching CdcColumn field
(now required on CdcTable) and regenerates docsfera.json.

Co-Authored-By: WOZCODE <contact@withwoz.com>

src/modules/platform-api/platform-api.controller.ts

@@ -1079,6 +1079,8 @@ export class PlatformApiController {
       // Iceberg destination only (protospack CdcTable.iceberg_table_name);
       // absent for snowflake, back-compat.
       iceberg_table_name?: string;
+      // Source column schema for iceberg deduped table pre-create (protospack CdcTable.columns).
+      columns?: { name: string; type: string; is_primary_key: boolean }[];
     },
     @User() user: RequestUser,
   ) {
@@ -1094,6 +1096,7 @@ export class PlatformApiController {
       primary_keys: body.primary_keys,
       name: body.table_name,
       iceberg_table_name: body.iceberg_table_name,
+      columns: body.columns ?? [],
     };
 
     this.logger.info('addTable: appending CDC table to DynamoDB', { inputId, tableName: body.table_name });