New /import/wizard: upload an arbitrary CSV, preview the column grid, map each column to a role + target meter/category + unit, dry-run, then commit as a revertible import_batch. The /import page now lists recent imports with one-click revert. Adds CsvImporter.ReadRawRows (raw preview) and Confirm.ConfirmAsync (generic confirm). Verified end-to-end in a real browser + direct DB checks.
Claude-Session: https://claude.ai/code/session_01Kib2MniVFbD95fkgLgBBnB
Correctness/data:
- Fix demo cost double-count: reference importer no longer imports the Kosten Strom/Wasser
columns for categories that are metered (only Heizung), so Wasser rollup is 70€ not 140€.
- Spurious-decrease guard: only a reset/swap in the window (prevReading, thisReading] explains
a decrease — an old historical reset no longer permanently disables the guard.
- Gate swap auto-detection on MappingProfile.DetectCumulativeSwaps (flag was ignored).
- Prorate basePrice by bucket length (day/month/year); guard virtual expressions against NaN/Inf.
Concurrency/infra:
- Blazor: register a DbContextFactory; CostService/DashboardService and the read pages now use
short-lived per-operation contexts (no shared circuit DbContext); guard Trends re-entrancy.
- /events: wrap event insert + consumption recompute in one transaction (atomic); 404 (not 500)
on unknown meter.
- MQTT worker: subscribe to newly-added topics on each tick; move client cleanup into finally.
- Migrations: CREATE MATERIALIZED VIEW IF NOT EXISTS + if_not_exists on CAgg/compression/
hypertable calls (re-run-safe after a mid-migration crash).
- HA worker: prune stale poll-schedule entries; export: null dangling ImportBatchIds on restore.
API/security:
- API fail-closed by default: with no keys and AllowAnonymousApi off, /api/v1 returns 401
(protects /export and /import). New MeterVault:AllowAnonymousApi opt-in.
- Cap /readings batch at 5000; report ignored (unknown-meter) count; enums as strings in JSON.
+4 regression tests (guard window, API closed, /events 404, no demo double-count). 98 tests
green; Docker deploy re-verified healthy with the API fail-closed.
Claude-Session: https://claude.ai/code/session_01WujdMtMJPbxDpDnMeK22rr
- German-dialect scalar parsers in Core (GermanNumber/Money/Date, ValueCell):
decimal comma, thousands dot, unit suffixes, € currency, both date shapes.
- Declarative MappingProfile + RowClassifier (skip summary/blank/all-zero rows) +
CsvImporter (CsvHelper) staging readings/events/manual-costs, with auto swap
detection on register decreases and month-end anchoring for interleaved oil dates.
- Four built-in ReferenceProfiles (Strom/Wasser/Heizöl/Kosten).
- ImportService: commit as revertible import_batch + wholesale consumption recompute
per affected meter (NormalizationService/MeterConfigFactory), revert by batch.
- Reconciliation tests: all 4 CSVs match the sheet's own columns within tolerance
(electricity 5 meters + Netz Einsparung, water swap→12, oil tank incl. deliveries +
burner hours, cost category totals). Commit/revert round-trip verified on Timescale.
69 tests green (53 Core + 16 integration).
Known follow-up (polish): historical imports can contend with the 30-day compression
policy's background job; tests pause it. Consider retry-on-deadlock or deferred
compression for large historical imports in production.
Claude-Session: https://claude.ai/code/session_01WujdMtMJPbxDpDnMeK22rr
schmidt.florian