Add 6 flag-based campaign segments to build_trucking_campaigns.py keyed off
fmcsa_carriers.deficiency_flags: for_hire_boc3, irp_ifta, intrastate_authority,
state_weight_tax (per-state LP), state_emissions (CA->ca-mcp-carb), hazmat.
Each injects an order-LP link into subscriber attribs (lp_link) and only
schedules when its CAMPAIGN_*_ID source template env is set (nightly run never
breaks on unconfigured templates). Adds --list-segments audience report and a
synthetic-data segment test (fixed a real psycopg2 % escaping bug in LIKE).
