T1.5: Migrate emit/parse sites to v2 wire format

docs/PRD/reports/README.md

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+# Task Reports
+
+One report per completed task. Filename pattern: `T<id>-report.md` (e.g. `T1.1-report.md`).
+
+The template lives in `../TASKS.md` under "Report template". Do not deviate from it — the reviewer reads these in bulk and consistency matters.
+
+If a task is reworked after `Changes Requested`, append a new section to the existing report rather than creating a new file:
+
+```markdown
+## Rework — <UTC timestamp>
+
+**Triggered by:** reviewer feedback "<short quote>"
+**Commit:** <new git sha>
+
+### What changed in this round
+
+- ...
+
+### Re-verification output
+
+```
+$ cargo test ...
+```
+```
+
+Then move the task back to `Pending Review` in the status board.