chore: include flow-php/arrow-ext in Dockerfile

[norberttech]

Change Log

---

Added

• flow-php/arrow-ext to Dockerfile
• flow-php/arrow-ext pie installation tests

Fixed

• packages README files

Changed

Removed

Deprecated

Security

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.19%. Comparing base (898e07b) to head (57b91c8).
⚠️ Report is 9 commits behind head on 1.x.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##              1.x    #2274      +/-   ##
==========================================
+ Coverage   82.88%   83.19%   +0.30%     
==========================================
  Files        1361     1368       +7     
  Lines       50798    51221     +423     
==========================================
+ Hits        42106    42613     +507     
+ Misses       8692     8608      -84     

Components	Coverage Δ
etl	90.61% <ø> (+0.84%)	⬆️
cli	85.76% <ø> (ø)
lib-array-dot	94.82% <ø> (ø)
lib-azure-sdk	60.05% <ø> (ø)
lib-doctrine-dbal-bulk	95.16% <ø> (ø)
lib-filesystem	83.33% <73.33%> (-0.10%)	⬇️
lib-types	88.88% <ø> (+1.50%)	⬆️
lib-parquet	70.18% <81.42%> (+1.30%)	⬆️
lib-parquet-viewer	83.04% <ø> (ø)
lib-snappy	90.65% <ø> (ø)
lib-dremel	0.00% <ø> (ø)
lib-postgresql	88.15% <ø> (ø)
lib-telemetry	89.57% <ø> (ø)
bridge-filesystem-async-aws	90.97% <ø> (ø)
bridge-filesystem-azure	89.43% <ø> (ø)
bridge-monolog-http	97.45% <ø> (ø)
bridge-openapi-specification	91.50% <ø> (ø)
symfony-http-foundation	74.11% <ø> (ø)
bridge-psr18-telemetry	100.00% <ø> (ø)
bridge-psr7-telemetry	100.00% <ø> (ø)
bridge-telemetry-otlp	89.29% <ø> (+0.25%)	⬆️
bridge-symfony-http-foundation-telemetry	88.23% <ø> (ø)
bridge-symfony-telemetry-bundle	67.60% <ø> (ø)
adapter-chartjs	84.72% <ø> (ø)
adapter-csv	88.65% <ø> (ø)
adapter-doctrine	92.00% <ø> (ø)
adapter-elasticsearch	92.78% <ø> (ø)
adapter-google-sheet	99.02% <ø> (ø)
adapter-http	67.91% <ø> (ø)
adapter-json	87.61% <ø> (ø)
adapter-logger	47.36% <ø> (ø)
adapter-parquet	78.89% <42.85%> (-0.41%)	⬇️
adapter-text	81.25% <ø> (ø)
adapter-xml	82.07% <ø> (ø)
adapter-avro	0.00% <ø> (ø)
adapter-excel	94.02% <ø> (ø)
adapter-postgresql	0.00% <ø> (ø)
bridge-phpunit-telemetry	48.14% <ø> (ø)

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