Add buffered TsFile input

[jt2594838]

Summary

• Add BufferedTsFileInput with a configurable ByteBuffer read cache and an 8 KiB default.
• Keep positional and sequential read semantics, InputStream wrapping, seeking, EOF handling, and close-state checks.
• Add focused unit tests and an opt-in TsFileSequenceReader performance test.
• Compare LocalTsFileInput with 4/8/16/32/64 KiB buffers across 100/1,000/10,000 points per chunk.

Performance

Each configuration reads 100 TsFiles and 1 billion points. The test rotates reader order per file to reduce page-cache ordering bias.

Points per chunk	Local	Buffered 8 KiB	Speedup
100	106.003 s	15.036 s	7.050x
1,000	20.293 s	10.235 s	1.983x
10,000	10.389 s	9.148 s	1.136x

Testing

• mvn test-compile surefire:test -P with-java -pl java/tsfile -am -Dtest=BufferedTsFileInputTest -Dsurefire.failIfNoSpecifiedTests=false
  • 4 tests passed
• Full opt-in performance matrix
  • 1 test passed, 18 billion points decoded and validated
• Checkstyle and Spotless passed

[codecov-commenter]

Codecov Report

❌ Patch coverage is 93.40659% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.53%. Comparing base (4668950) to head (dbd56e0).

Files with missing lines	Patch %	Lines
...apache/tsfile/read/reader/BufferedTsFileInput.java	96.55%	3 Missing ⚠️
.../main/java/org/apache/tsfile/utils/PublicBAOS.java	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #868      +/-   ##
===========================================
+ Coverage    60.47%   60.53%   +0.06%     
===========================================
  Files          740      741       +1     
  Lines        48617    48708      +91     
  Branches      7713     7726      +13     
===========================================
+ Hits         29400    29486      +86     
- Misses       17809    17814       +5     
  Partials      1408     1408              

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