fix: Chronicle session_files and session_refs tables always empty

[Copilot]

Three independent bugs caused session_files and session_refs to never receive any rows despite the tracking code existing.

Root causes

• Wrong OTel attribute name — _extractToolArgs read from gen_ai.tool.input / gen_ai.tool.input.*, neither of which exists on VS Code tool spans. toolsService.ts stores arguments as gen_ai.tool.call.arguments (GenAiAttr.TOOL_CALL_ARGUMENTS), a JSON string. This made every extractFilePath / extractRefsFromMcpTool call receive {}, so nothing was ever tracked.

• Missing tool names in FILE_TRACKING_TOOLS — the set only had CLI-era names (str_replace_editor, create) and was missing the VS Code Copilot editing tools: insert_edit_into_file, replace_string_in_file, multi_replace_string_in_file.

• Unhandled argument shapes — apply_patch embeds file paths inside the patch text (*** Add/Update/Delete File: <path>), not in a filePath field; multi_replace_string_in_file nests filePath inside a replacements array. Neither was handled by extractFilePath.

Changes

• sessionStoreTracker.ts — rewrite _extractToolArgs to parse span.attributes[GenAiAttr.TOOL_CALL_ARGUMENTS]

• sessionStoreTracking.ts:

  • Expand FILE_TRACKING_TOOLS with the three missing VS Code tool names (CLI names retained for compat)
  • Add dedicated extractFilePath branches for apply_patch (regex over patch text) and multi_replace_string_in_file (first entry of replacements array); uses existing getStringField helper

• standupPrompt.spec.ts — replace the previously incorrect apply_patch test (which passed a synthetic { filePath } that never occurs at runtime) with tests covering all actual argument shapes