fix(streams): safely parse stream flags without throwing on malformed ScVal (closes #617)

[Ranjeet2063]

Summary

Closes #617.

This pull request ensures parseStreamInfo handles malformed or non-u32 flags values gracefully by falling back to 0 rather than raising an unhandled exception.

Changes Made

• src/streams.ts: Wrapped scValToU32(m['flags']) in a safe conversion block with fallback to 0 if m['flags'] is present but contains an invalid/unexpected ScVal type.
• src/tests/parse-stream-info.test.ts: Added unit test verifying that parseStreamInfo falls back to flags = 0 when flags is not a u32 ScVal (e.g. scvString('not-a-u32')), keeping paused, cancelled, and clawbackEnabled safely false.

Acceptance Verification

1. npm test -- src/tests/parse-stream-info.test.ts passes with 7/7 tests green.
2. Clean production ESM & CJS build (npm run build).

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.