feat: Make primary keys available

[ReubenFrankel]

This feature adds support for primary keys through AccessTable instances . This doesn't change the existing API of AccessParser.parse_table, but does add a new get_table method to expose the underlying AccessTable instance (and subsequently the primary keys via AccessTable.primary_keys).

With examples/test.mdb:

Python 3.7.16 (default, Dec  6 2022, 19:08:09) 
[GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from access_parser import AccessParser
>>> db = AccessParser("examples/test.mdb")
>>> db.catalog
{'MSysObjects': 2, 'ClarotyTable': 18, 'f_AF8292619150475ABBCC3E04860C1240_Data': 22, 'MSysNameMap': 36, 'MSysNavPaneGroupCategories': 44, 'MSysNavPaneGroups': 47, 'MSysNavPaneGroupToObjects': 51, 'MSysNavPaneObjectIDs': 59}
>>> claroty_table = db.get_table("ClarotyTable")
>>> claroty_table.primary_keys
['ID']
>>> claroty_table.parse()
defaultdict(<class 'list'>, {'ID': [1, 2], 'Field1': ['test', 'test2'], 'Field2': ['Claroty', 'Claroty'], 'Field3': ['ICS!', None]})
>>> db.parse_table("ClarotyTable")
defaultdict(<class 'list'>, {'ID': [1, 2], 'Field1': ['test', 'test2'], 'Field2': ['Claroty', 'Claroty'], 'Field3': ['ICS!', None]})

[SharonBrizinov]

Nice, we'll check this and add comments if needed. Any chance you could upload somewhere the test DB you used?

[ReubenFrankel]

@SharonBrizinov Thanks, I tested this change against https://github.com/Matatika/tap-msaccess/blob/a208b5e6ddc4b909c84643271d819c60f8251d72/sample_db/Books.accdb, as well as some customer data and examples/test.mdb in above axample.

[SharonBrizinov]

lgtm