Truncate tag to allow longer workflow names

[timothyF95]

Summary

• The workflow registry contract limits tags to 32 bytes, but the CLI uses the workflow name (up to 64 chars) as the tag, causing deployments to fail for longer names.
• Truncates the tag to 32 bytes in ResolveInputs and updates workflowExists() to use the truncated tag for consistency.
• No impact on existing workflows — names >32 chars always failed before, so no on-chain records need migration.

Test plan

• Added TestResolveInputs_TagTruncation covering short names, exactly 32 chars, 33 chars, and 64 chars
• All existing deploy tests pass