test(bf-5h1wt): record TH-05 baseline runtime measurement

- TH-05 test suite completed in 23.080s (19.2% of 120s budget)
- No failures, timeouts, warnings, or skips observed
- Results documented in notes/bf-5h1wt.md

Closes bf-5h1wt

notes/bf-5h1wt.md

@@ -0,0 +1,33 @@
+# bf-5h1wt: TH-05 Test Suite Baseline Runtime Measurement
+
+## Task
+Measure baseline runtime of TH-05 test suites for comparison against the 120-second budget.
+
+## Execution
+Command: `time cargo nextest run --test TH-05-ssrf-block --all`
+
+## Results
+
+### Runtime
+- **Real time:** 23.080 seconds
+- **User time:** 28.986 seconds  
+- **System time:** 3.712 seconds
+
+### Status
+- **Overall:** PASS
+- **Test failures:** None
+- **Test timeouts:** None
+- **Warnings:** None observed
+- **Skips:** None observed
+
+## Analysis
+The TH-05 test suite completed in **23.080 seconds**, which is **19.2% of the 120-second budget** (96.2 seconds under budget). This provides a comfortable baseline for future performance comparisons.
+
+## Acceptance Criteria Status
+- ✅ TH-05 test suites are executed with time measurement
+- ✅ Real time is captured and recorded (23.080s)
+- ✅ Results are saved for comparison to 120-second budget
+- ✅ Any test failures or timeouts are noted (none)
+
+## Conclusion
+Baseline measurement complete. The TH-05 test suite runs efficiently with substantial headroom relative to the 120-second budget.