fix(packaging): exclude scoped chore and docs commits from roborev

The exclusion patterns are substring matches, so `chore:` never matched
`chore(packaging):`. Because the cadence rule in AGENTS.md mandates the
`type(ws):` scope, every chore and docs commit was being reviewed -- job 15
spent a thorough review on a config-only commit. Adds the `chore(` and `docs(`
forms.

Also names pm/compass.toml as authoritative for the review rules, so the
prose copy in AGENTS.md cannot silently drift from the generated
.roborev.toml. Raised by roborev job 15.

.roborev.toml

@@ -2,7 +2,9 @@
 # Reviews are queued to a background daemon -- they never block a commit.
 
 post_commit_review = 'commit'
-excluded_commit_patterns = ['WIP', 'chore:', 'docs:', 'Merge ']
+# Scoped conventional commits (`chore(packaging):`) do not contain `chore:`,
+# and this repo's cadence rule mandates the scope -- so both forms are listed.
+excluded_commit_patterns = ['WIP', 'chore:', 'chore(', 'docs:', 'docs(', 'Merge ']
 
 review_guidelines = '''
 # --- compass:begin (generated -- edit the sources, not this) ---

AGENTS.md

@@ -35,6 +35,12 @@ type(ws): subject (#N)
 
 ## Conventions
 
+`pm/compass.toml` is authoritative for these rules. Its `[roborev]
+project_guidelines` are composed into `.roborev.toml`, so change them there and
+re-run compass rather than editing `.roborev.toml` by hand. The prose below is the
+same rules stated for a human reader; if the two ever disagree, `pm/compass.toml`
+wins.
+
 **Dependencies.** Base R plus ggplot2 (>= 4.0), grid/gridExtra, png/jpeg, stringr,
 stringdist, showtext/sysfonts, jsonlite. No tidyverse: no dplyr, purrr, magrittr,
 tibble, or data.table. Prefer an existing dependency or base R over adding one —