Exporter release 1.0.0b49

[rads-1996]

1.0.0b49 (2026-03-09)

Features Added

• Generate exporter with TypeSpec
  (#44442)
• Generate LiveMetrics from TypeSpec
  (#44696)
• Add Browser SDK loader SDK Stats feature bit
  (#42904)

Bugs Fixed

• Add environment variable to disable/enable custom properties truncation
  (#45479)
• Fix io counters import issue in performance counters
  (#45286)
• Remove custom properties truncation
  (#45118)
• Fix fallback logic when connection string is provided only via environment variable
  (#45252)

Other Changes

<this section will be populated after this is merged>