PRS-22, finalize history by RPC with state update

[BoogVAr]

• Disabled automatic finalization by MAX_LOCKOUT_HISTORY; history now accumulates until an external signal.
• replayHistory performs replay: reset to root, replay to target slot, set new root.
• replayHistory supports exclude_signatures (txid of the first signature); matching transactions are skipped during replay.
• replayHistory supports prepend_transactions: base64‑encoded VersionedTransaction strings inserted at the start of specified slots.
• finalizeHistory sets root directly without replay.
• Slot fallback: if slot is omitted or 0, use the highest frozen slot above current root (error if none).
• Added a safety timeout to force replay‑finalize if no external finalize arrives in time.
• Added a dedicated finalize‑history RPC listener with its own enlarged max_request_body_size to handle large requests.
• Account patching removed; direct state mutation is unsafe.

RPC methods

finalizeHistory(slot?)
replayHistory(slot?, exclude_signatures?, prepend_transactions?)

New CLI flags

--finalize-history-rpc-port (default: rpc-port + 2)
--finalize-history-rpc-max-request-body-size (default: 100MB)
--external-finalize-timeout-secs (default: 3600)

Replay payload fields

exclude_signatures: [, ...]
prepend_transactions: { "": ["<tx_base64>", ...], ... }