T4: workstreams.md and dependencies.md now call /state/deps instead of the
full /state/summary — removes 2 heavy 10-table queries per 60 s cycle.
T5: index.md's 4 independent polling loops (summaryState, sbomSnapState,
regsState, wsChartState) consolidated into a single pageState generator
with one Promise.all batch and a shared backoff counter.
T6: config.js gains waitForVisible(ms) — pauses polling entirely while the
tab is hidden and fires immediately on visibilitychange. pollDelay()
simplified (hidden-tab POLL_HIDDEN logic removed). All 16 polling pages
migrated from await sleep(pollDelay(...)) to await waitForVisible(pollDelay(...)).
CUST-WP-0039 complete — all 6 tasks done.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
T1: Cache-Control max-age=60 on /topics/, /repos/, /domains/ list endpoints
so repeated dashboard polls within a minute are served from browser cache.
T2: ETag middleware (md5 hash) on all JSON GET responses with conditional-GET
(304 Not Modified) support; If-None-Match and ETag added to CORS headers.
ETag registered inside CORS so 304s automatically carry CORS headers.
T3: GET /state/deps — lightweight dep-graph endpoint returning open workstreams
with depends_on/blocks edges only, skipping the 10-table full-summary query.
Prerequisite for T4 (switching workstreams.md and dependencies.md off /state/summary).
Workplan: CUST-WP-0039-dashboard-poll-optimization.md
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
