Support getting line/column instance information for standard output

[staging-devin-ai-integration]

Support getting line/column instance information for standard output

Summary

Adds a new overload of sourcemeta::blaze::standard that accepts a sourcemeta::core::PointerPositionTracker parameter. When provided, error and annotation unit objects in the Basic output format are augmented with an instancePosition array property ([lineStart, columnStart, lineEnd, columnEnd]).

The position is looked up by converting each unit's instance_location (a WeakPointer) to a Pointer via sourcemeta::core::to_pointer() and querying the tracker. If no position is found for a given pointer, the instancePosition field is omitted. For StandardOutput::Flag, the positions parameter is accepted but ignored (flag mode doesn't produce unit objects).

Files changed:

• src/output/include/sourcemeta/blaze/output_standard.h — new overload declaration with Doxygen example
• src/output/output_standard.cc — new overload implementation
• test/output/output_standard_basic_test.cc — 4 new test cases

Review & Testing Checklist for Human

• Code duplication: The new overload copies the entire body of the original standard function and adds position-lookup blocks. Verify this is the preferred pattern vs. a shared internal helper, since future changes to the original function must be manually mirrored.
• Verify position values in tests are correct: The test positions_errors expects [2, 3, 2, 10] and positions_annotations expects [1, 1, 3, 1]. Manually trace through PointerPositionTracker behavior with the given JSON inputs to confirm these are accurate.
• Missing test coverage: No test for nested instance locations (e.g., /foo/bar/0), and no test for the case where positions.get() returns std::nullopt (verifying the field is correctly omitted). Consider adding these.

Notes

• All 8 existing test suites pass (make clean).
• make configure compile passes with no formatting diff remaining.

Link to Devin Session: https://staging.itsdev.in/sessions/c1783be122ec4cec85db12f901d03e67
Requested by: bot_apk

[staging-devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring