chore: adopt compass for project tracking

Three workstreams -- the query verbs, the corpus and how it is mounted, and the
docs that explain both. Each can go stale independently, which is what the
workstream boundary is for: a change to a verb obligates the vignettes, a change
to the corpus obligates NEWS.

All six open issues now carry ws/ and type/ labels, applied additively so #36
kept its existing kodor/, severity/, south-guide and verdict/ labels. The
generated board is pinned as issue #68.

.roborev.toml carries review guidelines composed from a shared baseline, the R
package overlay, and this project's own conventions read out of CLAUDE.md: the
ensure_session-then-dbGetQuery order, the tbl_df-with-provenance return
contract, coerce_govid_input at the boundary, the two SQL layers, no arrow, and
withr as tests-only.

The .gitignore change is load-bearing. pkgdown output made docs/ ignored, which
would have left every compass file untracked and unable to travel to another
machine. Git cannot re-include anything beneath an excluded directory, so the
rule had to list children instead. That forced an anchoring change: a bare
"docs/" matches at any depth, "/docs/*" only at the root, so the fixture corpus
docs directory needed an explicit rule to stay excluded as before.

docs/pm/JOURNAL.md

@@ -0,0 +1,14 @@
+# Project journal
+
+Append-only, newest first. **Entries are never edited** — the value of this file is
+that it records what was believed at the time, including the parts that turned out
+wrong. Where things stand *today* is in `STATUS.md`, which is generated.
+
+Four lines per entry. The analysis belongs in the issue or the decision record; this
+file carries the reasoning and the pointers.
+
+- **Why** — the driver. The one line git cannot reconstruct later.
+- **Obligates** — issues this change created elsewhere. Numbers, not prose.
+- **Refs** — commits, issues, decision records.
+
+---