chore: auto-commit (5 archivos)

- playground/tables/CMakeLists.txt
- playground/tables/data_table.cpp
- playground/tables/self_test.cpp
- playground/tables/tql_duckdb.cpp
- playground/tables/tql_duckdb.h

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

playground/tables/CMakeLists.txt

@@ -1,5 +1,8 @@
 # Tables playground (cpp_apps.md / playgrounds.md). NO se indexa.
-add_imgui_app(tables_playground
+# Build flag FN_TQL_DUCKDB=ON activa el adapter tql_duckdb (issue 0080).
+option(FN_TQL_DUCKDB "Enable DuckDB SQL execution adapter for tables playground" OFF)
+
+set(_TABLES_SRC
     main.cpp
     data_table.cpp
     data_table_logic.cpp
@@ -9,10 +12,7 @@ add_imgui_app(tables_playground
     tql_to_sql.cpp
     viz.cpp
 )
-target_link_libraries(tables_playground PRIVATE lua54 implot)
-
-# Self-test E2E (logica pura + lua_engine + tql).
-add_executable(tables_playground_self_test
+set(_TABLES_TEST_SRC
     self_test.cpp
     data_table_logic.cpp
     llm_anthropic.cpp
@@ -20,8 +20,28 @@ add_executable(tables_playground_self_test
     tql.cpp
     tql_to_sql.cpp
 )
+if(FN_TQL_DUCKDB)
+    list(APPEND _TABLES_SRC tql_duckdb.cpp)
+    list(APPEND _TABLES_TEST_SRC tql_duckdb.cpp)
+endif()
+
+add_imgui_app(tables_playground ${_TABLES_SRC})
+target_link_libraries(tables_playground PRIVATE lua54 implot)
+if(FN_TQL_DUCKDB)
+    target_compile_definitions(tables_playground PRIVATE FN_TQL_DUCKDB=1)
+    target_link_libraries(tables_playground PRIVATE duckdb_vendored)
+    duckdb_copy_runtime(tables_playground)
+endif()
+
+# Self-test E2E (logica pura + lua_engine + tql).
+add_executable(tables_playground_self_test ${_TABLES_TEST_SRC})
 target_include_directories(tables_playground_self_test PRIVATE
     ${CMAKE_CURRENT_SOURCE_DIR}
     ${CMAKE_SOURCE_DIR}/functions
 )
 target_link_libraries(tables_playground_self_test PRIVATE lua54)
+if(FN_TQL_DUCKDB)
+    target_compile_definitions(tables_playground_self_test PRIVATE FN_TQL_DUCKDB=1)
+    target_link_libraries(tables_playground_self_test PRIVATE duckdb_vendored)
+    duckdb_copy_runtime(tables_playground_self_test)
+endif()