optimize: add support for Jackson serialization and deserialization of PostgreSQL array types

[maple525866]

• I have read the CONTRIBUTING.md guidelines.
• I have registered the PR changes.

Ⅰ. Describe what this PR did

1. Problem Background
When the database is PostgreSQL, the table contains an array type.
When using Seata AT mode, a JSON deserialization exception is thrown when a service failure triggers a global transaction rollback.

2. Problem Analysis

• Seata Array Handling Mechanism:

  • PostgreSQL array fields are encapsulated as org.apache.seata.rm.datasource.sql.serial.SerialArray objects.
  • This object contains baseType, baseTypeName, and elements fields.

• Jackson Serialization Configuration:

  • The JacksonUndoLogParser has enableDefaultTyping enabled for type information processing.
  • However, there are no dedicated serializers and deserializers for the SerialArray type.

• Deserialization Conflict:

  • Jackson attempts to deserialize the JSON array directly into the java.lang.Long type.
  • This results in a type mismatch exception.

3. Solution:

• Add dedicated SerialArray serializers and deserializers to JacksonUndoLogParser to ensure:
• Correct JSON structure: Serialize SerialArrays into a clear object structure.
• Type information compatibility: Support Jackson's enableDefaultTyping mechanism.
• Null value handling: Correctly handle null elements in arrays.

Ⅱ. Does this pull request fix one issue?

fixes #7661

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

testSerializeAndDeserializeSerialArray()

• Purpose: Verify serialization/deserialization of a valid array
• Data: [1L, 2L, 3L, 4L, 5L]
• Verify: All fields match exactly

testSerializeAndDeserializeSerialArrayWithNulls()

• Purpose: Verify handling of arrays containing null elements
• Data: [1L, null, 3L]
• Verify: Null values ​​are correctly preserved

mvn clean test

Ⅴ. Special notes for reviews

ps: I also changed the access modifier of DmdbTimestampDeserializer to private.❤️

[codecov]

Codecov Report

❌ Patch coverage is 63.79310% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.25%. Comparing base (a977730) to head (5bbe847).
⚠️ Report is 1 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...m/datasource/undo/parser/JacksonUndoLogParser.java	63.79%	16 Missing and 5 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #7669      +/-   ##
============================================
- Coverage     61.40%   61.25%   -0.15%     
  Complexity      666      666              
============================================
  Files          1314     1314              
  Lines         49760    49817      +57     
  Branches       5849     5858       +9     
============================================
- Hits          30553    30514      -39     
- Misses        16474    16561      +87     
- Partials       2733     2742       +9     

Files with missing lines	Coverage Δ
...m/datasource/undo/parser/JacksonUndoLogParser.java	68.77% <63.79%> (-1.64%)	⬇️

... and 14 files with indirect coverage changes

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[slievrly]

LGTM