Cursor needs to be updated to accept systemModifiedAt fields that are greater than or equal to "0001-01-01T00:00:00Z"

## Title
Business Central Connector: Need support for legacy records with minimum datetime systemModifiedAt values

## Description
We're encountering an issue with the Business Central connector related to legacy records in our tenant that were created before the introduction of the `systemModifiedAt` field in the API pages.

### Current Behavior
- Some records in our Business Central tenant (initialized in 2016/2017) have `systemModifiedAt` values of `0001-01-01T00:00:00Z`
- These records were created before the `systemModifiedAt` field was introduced and never had subsequent triggers to update this field
- The connector's cursor appears to be filtering out these records, preventing them from being synced

### Expected Behavior
- The connector should accept and process records with `systemModifiedAt` values greater than or equal to `0001-01-01T00:00:00Z`
- This would ensure complete data synchronization, including legacy records

### Impact
- Missing legacy records in our data warehouse
- Incomplete historical data for business analysis
- Potential data inconsistency issues
- Continued ticket requests from Fivetran

### Technical Details
- Tenant initialization date: 2016/2017
- Affected records: Those created before `systemModifiedAt` field implementation
- Current minimum datetime value affected: `0001-01-01T00:00:00Z`

### Proposed Solution
Modify the connector's cursor logic to:
1. Accept records with `systemModifiedAt` values greater than or equal to `0001-01-01T00:00:00Z`
2. Consider these as valid timestamps for the initial sync
3. Include these records in the regular incremental sync process

### Additional Context
This issue specifically affects Business Central tenants that were initialized before the introduction of the `systemModifiedAt` field in the API pages. While the connector works excellently for newer records, this adjustment would ensure comprehensive data coverage for long-standing Business Central implementations.

## Environment
- Connector: Business Central
- Tenant Creation Date: 2016/2017
- API Version: v2.0

Would you please review this request and advise on the feasibility of implementing this cursor adjustment? This would greatly help ensure complete data synchronization for the Microsoft Dynamics 365 Business Central implementations.

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