Fix time-series filtering

[osopardo1]

Description

Fixes #202 (and #201 😃 )

Type of change

It is a Bug Fix for the reading part, it does not include breaking changes on the algorithm or the writing of the files.

Now TimestampType and DateType are pre-processed on QueryFilterUtils to return a Millisecond representation that can be filtered properly by the index.

Checklist:

Here is the list of things you should do before submitting this pull request:

• New feature / bug fix has been committed following the Contribution guide.
• Add comments to the code (make it easier for the community!).
• Change the documentation.
• Add tests.
• Your branch is updated to the main branch (dependent changes have been merged).

How Has This Been Tested? (Optional)

I've added a test on src/test/scala/io/qbeast/spark/index/query called TimeSeriesQueryTest. In this class, I've tested four different ways of creating an index on a Date / Timestamp column. Each one were failing differently, and should fail if executed with previous commits.

Test Configuration:
TBD.

[osopardo1]

To have a fixed version for 0.3.x for compatibility with Spark 3.2.x, the commits of this PR should be merged into a new 0.3.5 version release, and updated accordingly.

We can start thinking about making a separate branch for version 0.3.x and 0.4.x / further versions.

[codecov]

Codecov Report

Merging #203 (a18d8dc) into main (6262048) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head a18d8dc differs from pull request most recent head 3b722d4. Consider uploading reports for the commit 3b722d4 to get more accurate results

@@            Coverage Diff             @@
##             main     #203      +/-   ##
==========================================
+ Coverage   93.81%   93.83%   +0.01%     
==========================================
  Files          85       85              
  Lines        2087     2091       +4     
  Branches      175      172       -3     
==========================================
+ Hits         1958     1962       +4     
  Misses        129      129              

Files Changed	Coverage Δ
...io/qbeast/spark/index/query/QuerySpecBuilder.scala	100.00% <ø> (ø)
...o/qbeast/spark/index/query/QueryFiltersUtils.scala	91.30% <100.00%> (+1.83%)	⬆️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[osopardo1]

Hello @alexeiakimov ! Could you review this quick fix? Thank you 🙌