* fix: write profiler output to /tmp instead of project root
The profiler was creating an argent-profiler-cwd/ directory inside the
user's project root. Output is now written to /tmp/argent-profiler-cwd/
using os.tmpdir() so no artifacts are left in the project tree.
* fix: remove project_root from profiler tools, drop getDebugDir param
No backwards compatibility needed — project_root is stripped from
ios-profiler-start and profiler-load schemas entirely, and getDebugDir
takes no arguments now that the path is always /tmp/argent-profiler-cwd/.
* fix: remove stale project_root from skill docs, add dump.test.ts
- SKILL.md and diagnostic-tools.md still referenced project_root for
profiler-load after it was removed from the schema — now corrected
- Add 17 tests covering getDebugDir, writeDump, writeDumpCompact,
readCpuProfile, and readCommitTree (all passing)
Filip131311