Truncate wrapped-record-hashes.pb on restart when writing is enabled (after jumpstart has read it)

[derektriley]

Background

Description:

Problem

When hedera.recordStream.writeWrappedRecordFileBlockHashesToDisk is enabled, WrappedRecordFileBlockHashesDiskWriter appends to wrapped-record-hashes.pb
indefinitely across restarts — the file grows without bound and is never reset.

We can't naively truncate it on every restart, though: WrappedRecordBlockHashMigration reads this same file during the jumpstart flow to compute continuing
block-root hashes from a historical checkpoint. If the file were cleared before that read, jumpstart would silently lose the data it needs
(resolveRecentHashesPath() would find no file, or a stale one).

Note that V0760BlockRecordSchema.migrate() already deletes this file when writing is disabled, but that runs during Hedera.initializeStatesApi(), which is
called before the jumpstart migration executes — so that call site can't be reused for this case without reordering startup.

Acceptance Criteria

Implement the above with unit tests

Dependencies

No response

Definition of Ready (DoR) Checklist

• Clear acceptance criteria
• Clear and detailed description
• Dependencies identified
• Links to documentation
• Should be completable in 2-3 Days
• Initial draft of Low-level design document
• At least high level test plan
• Groomed/Estimated

Definition of Done (DoD) Checklist

• Acceptance Criteria complete
• No Codacy issues greater than minor (in new code)
• JavaDocs updated/created
• Code commented
• Unit tests created/updated
• 80% test code coverage (in new code)
• Happy Path and major negative cases in HAPI tests as applicable