analytics: V1 auction with Optable sources is not missed

[MO-Thibault]

Summary

Same fix as #356, applied to the V1 add-on (lib/addons/prototypes/analytics.js), which is the one that sends auction_processed and feeds bid_analytics. #356 changes V2 only.

V1 flags an auction missed when it completed before the analytics hook attached, regardless of whether Optable EIDs were already on the bid requests. When the wrapper reads the EID cache before the hook attaches, the auction is enriched but still reported as missed. The payload now sends missed: missed && optableSources.length === 0, using the auction-level union already built for optableSources.

Case	missed
Hooked in before the auction	false
Hook attached late, Optable sources present	false (was true)
Hook attached late, no sources	true

V1 has no optableLoaded field, so unlike #356 there is no second field to keep tied to hook timing.

Downstream

Historical rows can be corrected in SQL with missed AND ARRAY_LENGTH(auction_struct.optableSources) = 0; the same expression is correct for rows emitted after this change.

Overlap

#351 adds lib/addons/prototypes/analytics.test.js. The tests here are in a separate file, analytics.missed.test.js, so the two PRs do not conflict on tests. The one-line change sits in witnessData, which #351 and #357 also edit; whichever merges later needs a trivial rebase.

Test plan

• New lib/addons/prototypes/analytics.missed.test.js: the three cases above
• The "late, sources present" test fails against the old line
• pnpm exec jest: 30 suites, 526 tests pass
• prettier --check clean on both files

🤖 Generated with Claude Code

[MO-Thibault]

Folded into #356 instead.