Function createReferenceEnvelope

createReferenceEnvelope(referenceArid: ARID, actualSize: number): Envelope
Creates a reference envelope that points to content stored in IPFS.

Reference envelopes are small envelopes stored in the DHT that contain a pointer to the actual envelope stored in IPFS. This allows the hybrid storage layer to transparently handle large envelopes that exceed the DHT size limit.

Port of create_reference_envelope() from hybrid/reference.rs lines 31-39.

Format
```
'' [
    'dereferenceVia': "ipfs",
    'id': <ARID>,
    "size": <number>
]
```
Parameters
- referenceArid: ARID
  The ARID used to look up the actual envelope in IPFS
- actualSize: number
  Size of the actual envelope in bytes (for diagnostics)
Returns Envelope
A reference envelope that can be stored in the DHT
- Defined in hybrid/reference.ts:57