open-source-silicon.dev

I get a bunch of these when hardening my DFFRAM based macro:
```[WARNING GRT-0009] missing route to pin LBANK.COLUMN\[1\].RAMCOLS.B_0_0.SLICE\[7\].RAM8x32.WORD\[5\].<http://W.B3.CG/CLK|W.B3.CG/CLK>```
Not sure if missing routes are sometimes expected, or a bug

It's a bug as far as I know, but I wasn't able to find a small enough test case to find out what's causing it. It happens in `estimate_parasitics -global_routing`, so FastRoute is somehow unable re-interpret its own guides correctly as far as I know because TritonRoute had no issue finding routes to the mentioned pins.