Renames `byStableKey: HashMap<String, Slot>` to
`byAddress: HashMap<Address, Slot>` in EventStoreProjection. Address
is a data class on every platform so equals/hashCode are derived
from (kind, pubKeyHex, dTag) — same identity as the synthetic string
key, but typed.
`stableKey(event)` / `stableKey(kind, pubKeyHex, dTag)` become
`addressOf(...)` returning `Address?`. Plain replaceables map to
`Address(kind, pubKey, "")`, addressables to
`Address(kind, pubKey, dTag)`, regular events to null.
`limit` was already used at insertNew() to enforce the cap on
inserts; left unchanged.
15/15 projection tests still pass.
https://claude.ai/code/session_01Jny85MTu1ynKgFBgysfWu5
Claude
f666fe2002