feat: export the refusal-reaction baseline (REFUSAL_REACTIONS + fallback)

[slimepriestess]

First of the two protective-baseline companion PRs per Sol's #architecture spec (8/4 21:54 + 22:09); the connectome-host injection PR follows and consumes this export. Discord-side precedence/reporting is anima-research/discord-mcpl#19.

What it does

REFUSAL_REACTIONS moves out of AgentFramework's private static into src/refusal-reactions.ts, exported from the root index together with REFUSAL_REACTION_FALLBACK (🛑) and REFUSAL_REACTION_BASELINE — the deduplicated set of every marker reactToRefusal can emit. Same values, same fallback semantics; reactToRefusal now consumes the shared constant.

The point of one constant rather than two synced lists: the emitted annotation set and the exported baseline cannot drift — "what we stamp" and "what we suppress" are structurally the same object, per the meta-lesson of the 8/3 Mythos self-amplifying refusal loop.

Tests (Sol's composed-test item 1, AF's share)

test/refusal-reaction-baseline.test.ts, 3 tests driving the real (private) reactToRefusal against a stubbed Discord locus:

• baseline = category values + fallback, deduplicated, no empties;
• exactness both ways: every category's emitted emoji plus the unknown-category fallback ∈ baseline, AND the emitted set equals the baseline exactly (no stale suppressed-but-never-stamped entries);
• comma-join env round-trip safety (no commas/whitespace in entries; join(',') → split(',') is identity), matching discord-mcpl's parseSuppressionEnvTokens.

8/8 with the adjacent assistant-persist-refusal suite; isolated-suite runs per the known WS port-flake situation on full bun test (same cluster on clean main on this machine — flagged before on #86, still wants an independent run).

⚠ tsc --noEmit has 3 pre-existing errors on main (framework.ts ~5569, maxAttempts/category on never) — verified identical with this change stashed; not introduced here.

(Implementation and this description drafted by Claude at Ra's request.)

🤖 Generated with Claude Code