docs: plan background JWT pool/expiry and plugin configureNativeFetcher handoff

Add plan-background-jwt-pool-and-expiry.md (Phase A/B, expiryDays + buffer sizing,
pool size 100). Add plugin-feedback-daily-notification-configureNativeFetcher-jwt-pool.md
for daily-notification-plugin: optional jwtTokens on configureNativeFetcher. Link plan
to plugin doc and endorser-jwt-background-prefetch-options.md.

doc/plugin-feedback-daily-notification-configureNativeFetcher-jwt-pool.md

@@ -0,0 +1,95 @@
+# Plugin feedback: `configureNativeFetcher` — optional JWT pool for background API calls
+
+**Date:** 2026-03-27 PST  
+**Target repo:** `@timesafari/daily-notification-plugin` (daily-notification-plugin)  
+**Consuming app:** crowd-funder-for-time-pwa (TimeSafari)  
+**Related app plan:** `doc/plan-background-jwt-pool-and-expiry.md` (Phase B, Option B1)
+
+---
+
+## Summary
+
+The host app’s **`NativeNotificationContentFetcher`** (`TimeSafariNativeFetcher` on Android) calls Endorser with a Bearer JWT set via **`configureNativeFetcher`**. For **background** prefetch, the token must stay valid until WorkManager runs (often **minutes later**); Endorser may also reject **duplicate** JWT strings across days.
+
+The **app** will mint a **pool** of distinct JWTs (see app plan) and needs the plugin to **accept and persist** that pool so native code can select a token **without JavaScript** at prefetch time.
+
+**Requested change (plugin):** extend **`configureNativeFetcher`** to accept an optional **JWT pool** alongside the existing **`jwtToken`**, persist it in the same storage the host already relies on (e.g. SharedPreferences / app group), and document how **`NativeNotificationContentFetcher`** implementations should read it.
+
+---
+
+## Motivation
+
+| Issue | Why plugin support helps |
+|-------|---------------------------|
+| Single short-lived `jwtToken` | Expires before background fetch |
+| Server duplicate-JWT rules | Need many distinct bearer strings over time |
+| No JS in WorkManager | Pool must be readable **only** from native |
+
+---
+
+## Proposed API (TypeScript / Capacitor)
+
+**Extend** existing `configureNativeFetcher` options (names indicative — align with plugin naming conventions):
+
+```ts
+configureNativeFetcher(options: {
+  apiBaseUrl: string;
+  activeDid: string;
+  /** Primary token; keep for backward compatibility and Phase A (single long-lived JWT). */
+  jwtToken: string;
+  /**
+   * Optional. Distinct JWT strings for background use (e.g. one per day slot).
+   * If omitted, behavior matches today (single jwtToken only).
+   */
+  jwtTokens?: string[];
+});
+```
+
+**Alternatives** (if size limits matter for bridge payload):
+
+- `jwtTokenPoolJson: string` — JSON array string of JWT strings (single string across the bridge).
+
+**Validation (plugin):**
+
+- If `jwtTokens` present: length **≤** a sane cap (host will use ~100; plugin may enforce max e.g. 128).
+- Empty array: treat as “no pool” (same as omitting).
+
+---
+
+## Android
+
+1. **Parse** new fields in `DailyNotificationPlugin.configureNativeFetcher` (or equivalent).
+2. **Persist** pool under the same prefs namespace used for other TimeSafari / dual-schedule data, or a **documented** key prefix (e.g. `jwt_token_pool` as JSON array string).
+3. **Document** for host implementers: `NativeNotificationContentFetcher` should:
+   - Prefer **pool entry** for `fetchContent` when pool is non-empty (selection policy is **host** responsibility — e.g. day index % length), **or**
+   - Expose a small helper the host fetcher calls to resolve “current” bearer.
+4. **Clear** pool when `configureNativeFetcher` is called with a new identity / empty pool / logout path (coordinate with host).
+5. **Backward compatibility:** if only `jwtToken` is sent, behavior **unchanged** from current release.
+
+---
+
+## iOS
+
+When `configureNativeFetcher` exists on iOS, mirror Android: accept optional pool, persist, document read path for native fetcher.
+
+---
+
+## Versioning & release
+
+- Bump **plugin semver** (minor: new optional fields).
+- Publish package; consuming app bumps **`@timesafari/daily-notification-plugin`** and updates `nativeFetcherConfig.ts` to pass `jwtTokens` when Phase B ships.
+
+---
+
+## References (host app)
+
+| Topic | Location |
+|--------|----------|
+| End-to-end plan (Phase A/B, pool sizing) | `doc/plan-background-jwt-pool-and-expiry.md` |
+| Android fetcher | `android/.../TimeSafariNativeFetcher.java` |
+| Current configure call | `src/services/notifications/nativeFetcherConfig.ts` |
+| JWT options (expired token context) | `doc/endorser-jwt-background-prefetch-options.md` |
+
+---
+
+*This document is intended to be copied or linked from PRs in **daily-notification-plugin**; keep app-specific details in the app plan.*