Add documentation on DateTime and timezone behavior including handlin…

[Adityav369]

…g of mixed formats and SDK type reconstruction examples

[jazzberry-ai]

Bug Report

Name	Severity	Example test case	Description
Incorrect datetime comparison in metadata filtering	High	Ingest documents with mixed datetime formats (naive, timezone-aware, timestamp) and filter using $gte or $lte.	The _filter_matches method in MockMorphik class does not correctly handle comparisons between datetime strings, integers (timestamps), and timezone-aware/naive datetimes, leading to TypeError exceptions. The fix involves adding checks for the types of the values being compared and converting them to appropriate types (datetime objects or timestamps) before performing the comparison.

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