Match Upstream Changes: Update scope value to support new exporter path

[rads-1996]

Include changes in upstream PR - microsoft/Agent365-python#235

[Copilot]

Pull request overview

Updates the Agent365 observability export configuration to match upstream changes by adjusting the export URL path structure and updating the production auth scope, plus adding tests to pin these values together.

Changes:

• Updated build_export_url() to include the /otlp/ segment in both standard and S2S export paths.
• Updated production observability scope constants to a new Agent365-specific scope value.
• Added snapshot-style tests to keep production endpoint, scope, and URL path structure from drifting independently.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

File	Description
tests/a365/test_utils.py	Updates the expected standard export URL to include /otlp/.
tests/a365/runtime/test_export_config_consistency.py	Adds snapshot tests pinning production endpoint, auth scope, and export URL path patterns.
src/microsoft/opentelemetry/a365/runtime/environment_utils.py	Updates PROD_OBSERVABILITY_SCOPE constant to the new scope value.
src/microsoft/opentelemetry/a365/core/exporters/utils.py	Updates build_export_url() paths and changes _A365_DEFAULT_SCOPE used by token resolvers.

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