Add db_journal_mode trait to FileIdManager classes

[kevin-bates]

This pull request adds the ability for operators/admins to set the journal mode of the underlying SQLite database. Because FileID Manager classes have different characteristics, the default db_journal_mode for the ArbitraryFileIdManager will be DELETE (which is the SQLite default), while the default for LocalFileIdManager will be WAL since its more performant from a multi-threaded standpoint - although not supported on NFS-mounted filesystems. Because the default FileID Manager is ArbitraryFileIdManager, environments configured on NFS-mounted filesystems should now work out-of-the-box.

Operators can use the db_journal_mode trait to set it to any valid value depending on their needs. The set of valid values are {"DELETE", "TRUNCATE", "PERSIST", "MEMORY", "WAL", "OFF"}.

The informational message indicating tables and indices will be created is also extended to include the journal mode setting:

[I 2023-02-22 16:37:48.496 FileIdExtension] ArbitraryFileIdManager : Creating File ID tables and indices with journal_mode = DELETE

Resolves: #60

[codecov]

Codecov Report

Base: 85.65% // Head: 86.03% // Increases project coverage by +0.37% 🎉

Coverage data is based on head (c0f61fe) compared to base (99c1830).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #61      +/-   ##
==========================================
+ Coverage   85.65%   86.03%   +0.37%     
==========================================
  Files           5        5              
  Lines         523      537      +14     
  Branches       68       69       +1     
==========================================
+ Hits          448      462      +14     
  Misses         53       53              
  Partials       22       22              

Impacted Files	Coverage Δ
jupyter_server_fileid/manager.py	90.79% <100.00%> (+0.33%)	⬆️

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[dlqqq]

Thanks!