fix(examples): deduplicate tooltip initialization

[fadi-george]

Description

One Line Summary

Share in-flight tooltip initialization and allow later retries after non-fatal failures.

Details

Motivation

Linear: SDK-5125, SDK-5124.

Both Capacitor demos now share concurrent initialization calls, cache completion only after successful parsing, and clear pending state on every exit without adding retry timers. Adapted from OneSignal/react-native-onesignal#1984.

Scope

Example tooltip helpers only; SDK APIs are unchanged.

Testing

• vp test run: 179 tests pass; coverage thresholds pass.
• Focused vp check for both tooltip helpers: passes.
• Both examples/demo and examples/demo_pods production web builds: pass.
• Mocked-fetch diagnostic: concurrent calls share one promise, malformed JSON permits a later retry, and successful data remains cached.
• Full vp check has an unchanged baseline README.md formatting failure.

Checklist

• I have filled out all required sections
• PR does one thing
• No public API changes
• Automated tests pass
• Diff reviewed