Canonical product route for Bitcode Exchange (retired product name: Packs).

Current Bitcode product routes:

• /reads — demand: synthesize and settle AssetPack options.
• /deposits — supply: synthesize and list AssetPack options.
• /exchange — durable activity reread: measurements, proof, settlement, compensation, delivery.

/exchange is a compatibility redirect into /exchange (query string preserved).

Commodity language AssetPack is unchanged. This experience is the market/activity surface, not a rename of AssetPack.

Source-bearing AssetPack contents remain withheld until settlement and delivery rules are satisfied.