docs(jobs): record discovery provenance evidence

docs/verification/jobs-001-job-discovery.md

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+# JOBS-001 job discovery verification
+
+Updated: 2026-08-10
+
+## Current verified increment
+
+- The authenticated discovery endpoint searches the official NAV feed and now returns an explicit `nav` source key, `NAV Arbeidsplassen` display name, `searched` acquisition type and one request-level retrieval timestamp.
+- Application deadlines are exposed only when NAV supplies the explicit `applicationDue` field. Missing deadline and work-mode data remain absent rather than inferred.
+- The discovery card renders the response source rather than a hardcoded label, links to the original NAV listing and distinguishes listing update, retrieval and deadline dates.
+- The existing reviewed URL-import flow preserves the NAV source and `NO` country code in the create-job request. This is covered with mocked UI data; no NAV request was made.
+- Source filtering is not added while the endpoint has exactly one verified source. Multi-source filtering remains conditional on real source data.
+
+## Evidence
+
+- Focused backend discovery test: 1/1 passed.
+- Focused discovery and reviewed-import UI tests: 2 suites, 4/4 passed.
+- Full backend: 630/630 passed.
+- Full frontend: 50 suites, 198/198 passed; existing Jest force-exit/open-handle warning remains.
+- Production frontend build and TypeScript checks passed.
+- `git diff --check` passed with line-ending notices only.
+- Implementation commit: `511a9f6`.
+
+## Not yet verified
+
+- No live NAV, browser, provider or production request was performed.
+- Required 375/768/1440, light/dark, keyboard, Norwegian/long-content and end-to-end import checks remain.
+- Sorting controls, submitted-search empty state, richer error/retry behavior and unavailable work-mode disclosure remain in JOBS-001.
+