Second pass with the avoid-ai-writing detector

The skill's detector scored the README, PARITY.md and the extracted
comment prose. Fixed what it flagged: hollow intensifiers, "in order
to", "additionally", "the whole point", bold sentences in docs, and
bold that had wrapped across comment lines. Comment prose scores a
maximum of 4 out of 100 across the repo.

One sweep rule mangled four comments ("which is the entire point of X"
lost its clause); repaired, and the rule now keeps the clause.

Comments and strings only. 1208 tests pass, counted from the XML.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

engine/src/test/kotlin/io/flamenet/e2e/PerMessageTimerTest.kt

@@ -12,8 +12,8 @@ import org.json.JSONObject
 /**
  * A timer on one message rather than the whole conversation (§6.17).
  *
- * **The rule that keeps this from making the product worse is that the
- * shorter timer always wins.** A per-message timer may only take life away,
+ * The rule that keeps this from making the product worse is that the
+ * shorter timer always wins. A per-message timer may only take life away,
  * never add it. Without that, a sender could defeat the recipient's
  * conversation timer by putting a long one on every message, turning a setting
  * the recipient chose, on their own device, into something the other party gets