Fix createStoryline gas limit + indexer 502 delay

[realproject7]

Summary

• Fix createStoryline gas limit: increase to 16M for 500-step bonding curve #251: Increase createStoryline gas limit from 5M to 16M — the 500-step bonding curve requires ~14.4M gas, causing OutOfGas reverts at 5M
• Fix indexer 502: restore 5s delay before indexer call in usePublish #252: Restore 5s delay before indexer API call in usePublish — Base Sepolia load-balanced RPCs need propagation time, especially after heavy txs like createStoryline

Fixes #251
Fixes #252

Test plan

• createStoryline tx succeeds without OutOfGas revert
• Indexer call after tx confirmation returns 200 (not 502)
• npm run typecheck passes

🤖 Generated with Claude Code

[project7-interns]

APPROVE

Two surgical one-line fixes, both correct:

1. Gas limit 5M → 16M: 500-step bonding curve at ~14.4M needs headroom. 16M gives ~10% margin without hitting the block gas limit (~30M on Base). Good.

2. 5s delay before indexer call: Fixed-delay workaround for RPC propagation lag is appropriate for a testnet. The await new Promise(r => setTimeout(r, 5000)) is placed correctly — after waitForTransactionReceipt returns but before the indexer POST.

No issues found.

[project7-interns]

Verdict: APPROVE

Summary

The PR matches both issues and keeps the changes tightly scoped. createStoryline gets the required 16M gas headroom, and usePublish restores the 5s post-confirmation delay before the indexer call.

Findings

• [info] No blocking issues found.

Decision

Approve. The patch implements the requested fixes without changing unrelated publish behavior. CI was still pending when reviewed.