release: v1.3.0-rc01 with batched apply and adaptive flush

[harrytmthy]

This release introduces v1.3.0-rc01, focusing on improved batching efficiency, adaptive flush performance, and stronger recovery reliability.

Highlights

• Batched apply pipeline:
  SafeBoxEngine now coalesces rapid edits and deletions before writing to disk, preventing redundant I/O bursts under frequent .apply() calls. This improves responsiveness while maintaining consistency. (#55, #156)

• Adaptive flush strategy:
  Blob store now performs one force() per updated page, dynamically balancing between immediate flushes for small commits and deferred flushes for batch operations, resulting in faster end-to-end writes. (#150, #154)

• Corruption recovery and repair:
  Blob store can now detect and truncate trailing corruption, while the recovery file supports partial deletes and exponential backoff replay for improved fault tolerance. (#143, #148)

• SafeBoxCrypto ByteArray APIs:
  Adds direct ByteArray encryption/decryption functions, removing Base64 and UTF-8 encoding overhead for binary use cases. (#152)

• Documentation polish:
  Improves the SafeBox vs EncryptedSharedPreferences comparison table for better clarity and readability. (#146)