feat(ev): add is_suspended/suspended_since to EVOpportunity (#13)

## What

Adds two additive, optional fields to the `EVOpportunity` interface:

- `is_suspended?: boolean` — true while a live opp's sharp reference is
momentarily suspended
- `suspended_since?: number` — unix seconds the suspension began
(present only when suspended)

## Why

Mirrors the server-side flag-gated suspended-opportunity state shipped
in **sharp-api-go #789** (`EV_SUSPENDED_STATE`). When Pinnacle (the
sharp ref) suspends a live market, the engine now keeps the opp
**visible-but-suspended** with the same stable `id` and the **edge
hidden** (never a stale EV%), instead of dropping it and re-adding on
resume — eliminating live EV flicker. SDK consumers need the field to
render the suspended state (greyed / EV hidden) and to keep the row in
place across resume.

## Safety / compatibility

- Purely **additive optional** fields — mirrors the
`team_side`/`market_segment` precedent (snake_case wire keys,
passthrough).
- **Inert until the server flag flips:** the fields are absent from the
wire unless `EV_SUSPENDED_STATE=1` on the API. Today (flag off) the wire
is byte-identical, so this is fully backward-compatible. No version
bump.
- `typecheck` + `build` pass.

Type: feat

Co-authored-by: paperclip-resolver[bot] <paperclip-resolver[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: 3 people

src/index.ts

@@ -351,6 +351,15 @@ export interface EVOpportunity extends NestedRefs {
   team_side?: 'home' | 'away' | 'draw' | 'over' | 'under'
   /** Canonical contest slice ("full_game" | "1st_half" | ...) — issue #689. Wire key snake_case. */
   market_segment?: string
+  /**
+   * True while this live opp's sharp reference is momentarily suspended: the bet is still
+   * offered but the edge is hidden (never a stale EV%). The opp keeps its stable `id`, so it
+   * updates in-place on resume instead of flickering. Wire key snake_case `is_suspended`.
+   * Optional/additive — only present when the server flag `EV_SUSPENDED_STATE` is enabled.
+   */
+  is_suspended?: boolean
+  /** Unix seconds when the suspension began; present only when `is_suspended` is true. Wire key snake_case. */
+  suspended_since?: number
   detectedAt: string
 }