Adds 30 integration tests across 7 test functions covering all progress
endpoints with real HTTP requests and database verification:
- AuthContexts (8 tests): unauthenticated PUT/GET return 401, regular
user and admin both get 200, invalid UUID returns 400, nonexistent
item returns 200 with empty data.
- MergePreservesFields (2 tests): second PUT with only percentage
preserves epubcfi and chapter from first save via GET verification;
web save preserves koreader character_offset via DB query.
- EnrichmentComputesFields (2 tests): character_offset computed from
percentage when total_characters is set on media item; GET returns
enriched format_group and total_characters.
- ConflictDetection (3 tests): different sources with >1% diff within
5 minutes creates sync_conflicts record; same-source rapid saves
create no conflict; <1% diff creates no conflict.
- KoboIntegration (3 tests): ReadingSync then last-read-place preserves
percentage via DB; standalone last-read-place sets epubcfi/chapter;
unauthenticated returns 401.
- KOReaderIntegration (2 tests): Bearer token auth with proper request
body returns 202 Accepted; unauthenticated returns 401.
- DeleteProgress (2 tests): DELETE clears progress; unauthenticated
returns 401.
- EdgeCases (4 tests): empty body succeeds, 0.0% and 1.0% boundaries,
all fields with full DB verification of each column.
Updates test_helpers to create ProgressService in setupTestServer and
inject into all handlers. Fixes previous tests that used testing.Short()
(which caused all tests to be skipped in the container) and assertions
against wrong JSON format (pgtype serializes as plain values, not
wrapped objects).
