chore(lore-0167): activate; link the originating I-usd-rate-table note both ways

lore/1-tasks/backlog/0167_FEATURE_usd-rate-table-and-peg-rate-population.md → lore/1-tasks/active/0167_FEATURE_usd-rate-table-and-peg-rate-population.md

@@ -2,7 +2,7 @@
 id: "0167"
 title: "Create prices.usd_rate and populate the peg-asset rates from oracle_prices — extracted from 0154 so it is not blocked behind 0111"
 type: FEATURE
-status: backlog
+status: active
 related_adr: []
 related_tasks: ["0154", "0151", "0165", "0168", "0139", "0111"]
 tags:
@@ -11,6 +11,7 @@ links:
   - "../../../packages/prices-clickhouse/schema/init.sql"
   - "../../../packages/oracle-worker/src/lib.rs"
   - "../../../packages/cleanup-worker/src/lib.rs"
+  - "../../../lore/1-tasks/archive/0144_BUG_be-0199-usd-read-surface-defects/notes/I-usd-rate-table.md"
 history:
   - date: 2026-08-07
     status: backlog
@@ -25,6 +26,30 @@ history:
       riskiest piece early and separately. Confirmed against 0151 that this does
       not re-open the schema-wide refactor it rejected — see §Relationship to
       0151.
+  - date: 2026-08-10
+    status: active
+    who: okarcz
+    note: >
+      ACTIVATED, and pulled ahead of the rest of the queue on ONE argument: it
+      is the only open task whose INPUT DATA EXPIRES. oracle_prices is pruned by
+      monthly partition drop at INTERVAL 13 MONTH (cleanup-worker/src/lib.rs:24)
+      and coverage starts ~2025-09, so 202509 ages out ~2026-10/11. Every month
+      this waits, a month of depeg-aware history is lost permanently. Everything
+      else on the board (0170, 0171, 0172, 0142) is static - the defects will be
+      just as fixable next month.
+      Now unblocked downstream as well: 0165 shipped to prod 2026-08-10 and is
+      publishing 891 daily USDC buckets at a hardcoded $1 with method='peg'. Its
+      three forward-compat requirements all landed, so 0168 is a one-expression
+      change against this table rather than a rewrite.
+      Originating reasoning is the I-usd-rate-table note under archived task
+      0144 - now linked from `links` and from that note's `spawns`, because it
+      was previously reachable only by knowing it existed in an archived task's
+      notes directory.
+      ⚠️ Scope guard restated: the SCHEMA-WIDE refactor in that note stays
+      REJECTED (0151). close_usd is not touched, nothing published becomes NULL,
+      and the key is NATURAL IDENTITY not quote_asset_id - 0139 is confirmed
+      genuine collisions, measured 2026-08-10 at 3,281 asset_ids across 6,568
+      identities, which a quote_asset_id-keyed table would have inherited.
 ---
 
 # `prices.usd_rate` + peg-asset rate population

lore/1-tasks/archive/0144_BUG_be-0199-usd-read-surface-defects/notes/I-usd-rate-table.md

@@ -3,7 +3,7 @@ title: "Idea — split the USD rate out of close_usd into a per-quote-asset rate
 type: idea
 status: mature
 spawned_from: notes/G-be-0199-reply-short.md
-spawns: []
+spawns: ["0167", "0168"]
 tags: [schema, clickhouse, enrichment, zero-as-missing, adr-input]
 links:
   - "../../../../../packages/enrichment-worker/src/ch_enrich.rs"
@@ -19,6 +19,23 @@ history:
       price table. Captured here as input to [[0151]], which this widens
       materially. Nothing measured yet — the two load-bearing numbers are
       flagged as open below.
+  - date: 2026-08-10
+    status: mature
+    who: okarcz
+    note: >
+      LINEAGE RECORDED. This note's narrow form is live as tasks 0167 (build
+      prices.usd_rate + populate the peg rates) and 0168 (publish the real rate
+      in price_usd_series in place of the hardcoded $1). The schema-wide
+      refactor below stays REJECTED per the decision block at the top - see
+      0151. Linked because the note was reachable only by knowing it existed in
+      an archived task's notes directory, which is how a settled decision gets
+      accidentally relitigated.
+      Context that post-dates the note: 0165 shipped the $1 placeholder to prod
+      on 2026-08-10 with the `method` provenance column, deliberately shaped so
+      0168 is a one-expression change. And the clock in this note is now the
+      binding constraint - oracle_prices is pruned at INTERVAL 13 MONTH, so
+      202509 ages out ~2026-10/11 and that depeg-aware history is unrecoverable
+      once dropped.
 ---
 
 # Split the USD rate out of `close_usd`