refactor: fix extension tool call

[mudit777]

Disclaimer: Do not include SAP-internal or customer-specific information in this PR (e.g. internal system URLs, customer names, tenant IDs, or confidential configurations). This is a public repository.

Description

Simplify call_extension_tool() signature by removing the extension_name and tool_prefix parameters. The tool_name argument is now used directly as the lookup key in source_mapping (no more prefix reconstruction), and the fallback extension name defaults to unknown internally via resolve_source_info().

Related Issue

Closes #<issue_number>

(Link to the GitHub issue this PR addresses)

Type of Change

Please check the relevant option:

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Code refactoring
• Dependency update

How to Test

Describe how reviewers can test your changes:

1. Run the telemetry extension unit tests: pytest tests/core/unit/telemetry/test_extensions.py -v
2. Run the full unit test suite: pytest tests/ --ignore-glob='**/integration*'
3. All 58 telemetry extension tests and 2007 total unit tests should pass.

Checklist

Before submitting your PR, please review and check the following:

• I have read the Contributing Guidelines
• I have verified that my changes solve the issue
• I have added/updated automated tests to cover my changes
• All tests pass locally
• I have verified that my code follows the Code Guidelines
• I have updated documentation (if applicable)
• I have added type hints for all public APIs
• My code does not contain sensitive information (credentials, tokens, etc.)
• I have followed Conventional Commits for commit messages

Breaking Changes

If this PR introduces breaking changes, please describe:

• What breaks: Callers of call_extension_tool() that pass extension_name or tool_prefix keyword arguments will get a TypeError at runtime.
• Migration path for users:
  • Remove the extension_name parameter — the extension name is now resolved internally from source_mapping, falling back to "unknown".
  • Remove the tool_prefix parameter — pass the full tool name (already prefixed if applicable) as tool_name directly.
  • Ensure source_mapping keys match the tool_name values being passed (i.e., use the final tool name, not the unprefixed version).
• Alternative approaches considered: Keeping extension_name as an optional fallback, but "unknown" is sufficient since source_mapping already provides the correct name in all practical cases.

Callers who previously passed only extension_name (without a matching source_mapping entry) will now see unknown in sap.extension.extensionName span attributes, instead of the previously provided extension name.

Additional Notes

Downstream consumers need corresponding updates to remove extension_name and tool_prefix from their call_extension_tool() call sites

[cla-assistant]

All committers have signed the CLA.

[tiagoek]

Superseded by #132, which combines this change with #128 in a single v0.19.3 release PR.

No further updates are expected on this branch. Please review and merge #132 instead.

[tiagoek]

merged via #132