feat(storage): index exact content references

docs/adr/0032-ravnoves00-methodology-correction-before-transfer.md

@@ -47,7 +47,9 @@ authority. It changes the claim that those artifacts are allowed to support.
    are admitted; no network transport starts implicitly.
 7. Current storage work starts with content-addressed references and exact-content
    deduplication. E44 measures `1.680146×` amplification across the admitted E30–E40
-   package/result roots. It does not authorize a storage-format or database migration.
+   package/result roots. E50 indexes every logical path against one verified canonical
+   SHA-256 locator without rewriting historical evidence. Neither result authorizes
+   physical reclamation, a storage-format change or a database migration.
 8. The later same-K1 transfer capture is preregistered before collection. E43 freezes
    minimum streams, route/control-bridge duration, connected scene/track/time
    partitioning, independent human review and truth reveal only after frozen
@@ -71,6 +73,8 @@ authority. It changes the claim that those artifacts are allowed to support.
   `e43-future-capture-protocol-28f091b9648daffce988d44c183e21f56d77988061630de934f8003fb13701d8`;
 - data-amplification audit:
   `e44-data-amplification-89791978894ec785009e5b76c9325de4d9e910237af57476c9331eb47a8ccca4`.
+- exact-content reference index:
+  `e50-content-reference-index-c10c5ed7345a4f23d46ed0f132d54c378433aa4351e14375805cfe3e28878c81`.
 
 ## Consequences
 
@@ -81,6 +85,9 @@ authority. It changes the claim that those artifacts are allowed to support.
   high-severity failures, complete accounting and zero false-free claims.
 - Further threshold or model tuning against the visible 146 items cannot close the
   blind gate. It may only create another explicitly visible engineering comparison.
+- Exact-content references remove duplicate namespace semantics for current evidence,
+  but the existing physical copies remain in place until a separate producer migration
+  is reviewed and authorized.
 - Work that does not require a new recording can proceed now: methodology enforcement,
   predictor/evaluator separation, invariants, telemetry, exact-content deduplication
   design and preregistration.