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Oleksandr Bezdieniezhnykh
e9d6db077c
Two integration-test failures uncovered after the initial commit: 1) GetTilesByRegionAsync outer ORDER BY referenced 'updated_at' but the inner DISTINCT ON subquery aliased it to 'UpdatedAt' (Postgres folds to 'updatedat'). DISTINCT ON already guarantees one row per (latitude, longitude, ...) so the third tiebreak was unreachable; removed it. 2) Dapper 2.1.35 silently bypasses SqlMapper.TypeHandler<T> for enum types during read deserialization (Dapper issue #259). The TileSourceTypeHandler worked for writes but reads fell through to Enum.TryParse, which cannot map 'google_maps' to GoogleMaps. Pivoted: TileEntity.Source is now a string (the wire value). TileSource enum stays as the public producer surface in Common.Enums; TileSourceConverter (Common.Enums) provides ToWireValue / FromWireValue / IsValidWireValue at the boundary. TileSourceTypeHandler deleted; registration removed from DapperEnumTypeHandlers.RegisterAll. tile-storage.md Inv-5 amended to document the storage choice. _docs/LESSONS.md L-001 records the Dapper bypass for future cycles. Full suite passes (213 unit + integration suite incl. AZ-484 AC-1..AC-5, security SEC-01..SEC-04, AZ-356/362/357). Co-authored-by: Cursor <cursoragent@cursor.com>