SPY Absorption Calls

Each entry carries the hash of the one before it, so deleting, editing or reordering any entry breaks every hash after it. Runs that failed before a decision are published too, so a record cannot hide the days she could not decide. entry_hash = sha256(prev_hash + '|' + seq + '|' + published_at + '|' + payload as JSON with sorted keys and no whitespace). The first entry's prev_hash is 64 zeros; each later entry's prev_hash is the entry_hash before it. Any edit, deletion or reordering breaks the chain.