feat: round verification_progress value in SSE

Bitcoin Core calculates the blockchain verification by including
unconfirmed transactions. This means that everytime there is
a new transaction, a `btc_info`  event is fired through  the SSE
channel. For clients this information is usually not  useful beyond
two digits. Solution: round to two digits for SSE events.

The full floating point value can still be fetched through
`/bitcoin/get-blockhain-info`

closes #52

app/repositories/bitcoin.py

@@ -77,6 +77,7 @@ async def _handle_gather_bitcoin_status():
     while True:
         try:
             info = await get_btc_info()
+            info.verification_progress = round(info.verification_progress, 2)
         except HTTPException as e:
             print(e)
             await asyncio.sleep(2)