Add vendor matching telemetry to E-Document import

[ventselartur]

Why

When an E-Document is imported and a purchase draft is prepared, the vendor is resolved through several strategies (by number, GLN, VAT id, service participant, name and address) and can also be carried over from history or assigned by a provider. Today we only emit a single boolean telemetry point indicating whether a vendor was found, which makes it impossible to understand how vendors are being matched in the field, where matching falls back to fuzzy name/address logic, or why no vendor was assigned. This change enriches the import session telemetry so we can analyze vendor-matching behavior and diagnose failures.

AB#639684

Summary

• Added Vendor Match Method telemetry in E-Document Import Helper.FindVendor, tagging which identifier (No, GLN, VAT Id) matched the vendor.
• Added Vendor Matched By Name Not Address boolean telemetry when a name-only candidate is found during fuzzy matching.
• Added Vendor Assignment Source telemetry in EDoc Prepare Purch. Draft distinguishing Already Assigned, Provider, History, and None.
• Added Vendor Info Present boolean and Vendor Match Method outcomes (None - No Vendor Info, Service Participant, Name and Address, None - No Match) in E-Doc. Providers.
• Refactored the provider's no-vendor-information branch into a single block so the warning and early-exit share one condition.