🧶 fix: Large Tool Inputs Break Bash PTC Replay and Pending-Call Serialization

[danny-avila]

I replayed the original three large Bash PTC commits from #48 onto the latest main while preserving the newer configuration coverage.

• Retain hashed oversized tool inputs so Bash replay matches cached calls without re-invoking tools.
• Reject multi-document tool input before pending-call serialization.
• Configure positive per-result and aggregate PTC history byte caps with safe fallbacks.
• Combine the PR's positive-integer configuration tests with the remote-bridge configuration coverage now on main.
• Supersede fix: large tool inputs break bash PTC replay and pending-call serialization #48 because its contributor branch has maintainer edits disabled and cannot be updated by repository maintainers.

Change Type

• Bug fix (non-breaking change which fixes an issue)

Testing

• Ran bun test src/config.test.ts (10 passed).
• Ran bun run scripts/test-ptc-replay-bash-smoke.ts (101 passed).
• Ran bunx tsc --noEmit --pretty false; it reports four existing repository type/configuration errors unrelated to these five changed files.

Test Configuration:

• Bun 1.3.13
• Dependencies installed from service/bun.lock with bun install --frozen-lockfile

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• My changes do not introduce new warnings
• I have written tests demonstrating that my changes are effective or that my feature works
• Local focused tests pass with my changes