feat(nspd): TIER 4 opportunity layers + red lines (#94 PR2 of 4)
- NSPDClient: QUARTER_OPPORTUNITY_LAYERS (auction/scheme/free/future/oopt)
+ QuarterDump.opportunity field
- nspd_sync: harvest_quarter accepts include_opportunity, denorm cols
has_auction_parcels + opportunity_count in UPSERT
- quarter_dump_lookup:
- _get_opportunity_parcels (sort by distance, early-exit on count=0)
- _get_red_lines (query existing dump.red_lines core path, layer='red_lines')
- SQL 89_*: has_auction_parcels + opportunity_count + partial index
- Pydantic: OpportunityParcel + RedLine schemas
- /analyze: nspd_opportunity_parcels + nspd_red_lines fields
- Frontend: NspdOpportunityBlock + NspdRedLinesBlock + LandTab integration
- Tests: 28 total (11 PR1 + 17 PR2), all pass
Red lines uses existing core harvest path (layer 879243 already in dump.red_lines
from PR1+core) — no duplicate harvest, no red_lines_count_v2 column needed.
Part of #94
ed3c128528