docs: freeze the known-good auction state and mark tradeOwner DISPROVEN

Records the live-client resolution so the market shape is now a fixture rather than
folklore, and so a future agent cannot burn deployments on tradeOwner again.

Confidence notes updated: tradeOwner remains FIFA17-HISTORICAL (it does exist in
the FIFA 17-era API) but "required by FIFA17.exe Transfer List Actions" is now
DISPROVEN for this client path -- it is not among the twelve atoms the client's
auctionInfo deserializer reads, and it was implemented, deployed, observed inert
and removed.

The real blockers are recorded as CONFIRMED live-client findings: trade/status
polling is load-bearing, `expires` must EVOLVE with wall-clock time (a frozen
value is structurally valid and behaviourally broken), and relist must persist
through the PK conflict that FIFA's re-sent ISStart necessarily causes.

Freezes the known-good bodies under docs/evidence/market-lifecycle-2026-08-17/
with a machine-checkable countdown proof (_index.json._countdown_proof records
expires decrementing, frozen:false) rather than asserting the clock in prose.

States the general rule this cost us: a response can pass differential parity and
render perfectly while still being wrong, because FIFA expects an evolving
server-side state machine, not a static object that resembles one.

docs/evidence/market-lifecycle-2026-08-17/_index.json

@@ -0,0 +1,38 @@
+{
+  "_countdown_proof": {
+    "delta": -4,
+    "expires_after_4s": 2216,
+    "expires_first": 2220,
+    "frozen": false
+  },
+  "auctionhouse-browse": {
+    "container": "object",
+    "path": "/auctionhouse",
+    "status": 200
+  },
+  "marketdata-pricelimits": {
+    "container": "array",
+    "path": "/marketdata/pricelimits?defId=20801",
+    "status": 200
+  },
+  "trade-status-filtered": {
+    "container": "object",
+    "path": "/trade/status?tradeIds=1000000097",
+    "status": 200
+  },
+  "trade-status-unfiltered": {
+    "container": "object",
+    "path": "/trade/status",
+    "status": 200
+  },
+  "tradePile": {
+    "container": "object",
+    "path": "/tradePile",
+    "status": 200
+  },
+  "tradePile-counts": {
+    "container": "object",
+    "path": "/tradePile/counts",
+    "status": 200
+  }
+}