feat(lint): add no-unused-vars ratchet scoped to src+open-sse+tests

Bar NEW unused vars/args/catches outside the `_` escape hatch via
@typescript-eslint/no-unused-vars (args:"all", caughtErrors:"all",
ignoreRestSiblings), scoped to src/**/*.{ts,tsx,js,jsx} + open-sse/**/*.ts
+ tests/**/*.{ts,tsx,mjs} — scripts/, bin/ and docs/ stay out of scope.

Pre-existing violations (1393 across 1251 files) are frozen in
config/quality/eslint-suppressions.json via --suppress-rule, same
pattern as #7879 (toNumber tier-by-tier). Only genuinely NEW unused
bindings fail lint from now on.

Also untracks two docs/superpowers/* planning files that slipped into
the tree via #11213 while being gitignored; their presence makes the
tracked-artifacts pre-commit hook reject every new commit.

Refs #9985

Author: Max

changelog.d/maintenance/PRNUM-ratchet-no-unused-vars.md

@@ -0,0 +1 @@
+- **chore(lint):** ratchet `@typescript-eslint/no-unused-vars` scoped to `src/` + `open-sse/` + `tests/` (`args: "all"`, `_`-prefix escape hatch) and freeze the 1393 pre-existing violations via bulk suppressions — same pattern as the #7879 `toNumber` ratchet. New unused bindings now fail lint. ([#PRNUM](https://github.com/diegosouzapw/OmniRoute/pull/PRNUM))