Cycle-2 retrospective covering AZ-487 + AZ-488. Captures six patterns
(duplicate JWT helpers diverged then both broke; pre-existing
test bugs unmasked by downstream test pressure; cycle 1 perf-NFR
action stopped adding scenarios but did not drain backlog; doc-path
F1 carried over twice with no decision; integration test DB
isolation = wallclock workaround; 8 SP friction observable even
with user override). Top-3 improvement actions: consolidate JWT
mint helpers, promote PT-07/PT-08/JWT-attach to real PBI, real
integration DB-reset hook.
LESSONS.md ring buffer now holds 6 entries (testing x3, process x2,
estimation x1).
Structural snapshot: 6 components / 12 PR edges unchanged; contract
coverage 14% -> 29%; new external NuGet edges (JwtBearer 8.0.21 +
ImageSharp 3.1.11) tied to cycle-2 security findings.
Autodev pointer advances to cycle 3 / Step 9 New Task.
Co-authored-by: Cursor <cursoragent@cursor.com>
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>
Oleksandr Bezdieniezhnykh