Add KV identity graph with CAS concurrency control (#536)#549

Draft

ChristianPavilonis wants to merge 14 commits intofeature/edge-cookiesfrom

feature/ec-kv-identity-graph

Commits on Mar 20, 2026

Rename Synthetic ID to Edge Cookie (EC) and simplify generation
ChristianPavilonis
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Fix remaining SSC naming vestiges, CI formatting, and dependency sync
ChristianPavilonis
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Fix integration test env var SYNTHETIC → EC and remaining stale references
ChristianPavilonis
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Rename config section [ec] → [edge_cookie] for clarity
ChristianPavilonis
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Remove unnecessary serde alias for edge_cookie config section
ChristianPavilonis
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Address review feedback: fix logging, cleanup dead config, improve docs
ChristianPavilonis
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Add ec/ module with EcContext lifecycle, fix consent gating (#533)
ChristianPavilonis
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Compute cookie domain from publisher.domain, move EC cookie helpers (#535)
ChristianPavilonis
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Fix auction consent gating, restore cookie_domain for non-EC cookies
ChristianPavilonis
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Add integration proxy revocation, refactor EC parsing, clean up ec_hash
ChristianPavilonis
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Remove fresh_id and ec_fresh per EC spec §12.1
ChristianPavilonis
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Commits on Mar 23, 2026