Replace INNER JOIN on objective_complex_mapping with LEFT JOIN approach:
competitors without mapping now return velocity=0 with
velocity_data_available=False instead of being silently dropped.
UI: VelocityBlock shows 'нет данных velocity' badge when flag is False
and hides the gauge (meaningless zero). TS type updated (additive optional
field, backward compat).
Audit (EKB, region_cd=66): mapped=129, unmapped=1387, total=1516.
Closes#271 item #10
b7ce4a589c