Add disk free space reports to Python build

These builds are on a knife's edge currently with respect to disk space.
I think it is worth logging `df` output so we can keep an eye on it.

Signed-off-by: Tom Jakubowski <tom@prospective.dev>

Author: tomjakubowski

.github/workflows/build.yaml

@@ -220,11 +220,19 @@ jobs:
                       arch: x86_64
 
         steps:
+            - name: Run df -h
+              if: ${{ runner.os == 'Linux' }}
+              run: df -h
+
             - name: Free up disk space
               if: ${{ runner.os == 'Linux' }}
               run: |
                   rm -rf /__t/*
 
+            - name: Run df -h
+              if: ${{ runner.os == 'Linux' }}
+              run: df -h
+
             - name: Checkout
               uses: actions/checkout@v4
 
@@ -237,6 +245,10 @@ jobs:
                   name: perspective-metadata
                   path: rust/
 
+            - name: Run df -h
+              if: ${{ runner.os == 'Linux' }}
+              run: df -h
+
             - name: Initialize Build
               id: init-step
               uses: ./.github/actions/install-deps
@@ -246,6 +258,10 @@ jobs:
                   manylinux: ${{ matrix.container && 'true' || 'false' }}
                   skip_cache: ${{ steps.config-step.outputs.SKIP_CACHE }}
 
+            - name: Run df -h
+              if: ${{ runner.os == 'Linux' }}
+              run: df -h
+
             - name: Python Build
               run: pnpm run build
               if: ${{ runner.os != 'Windows' }}
@@ -268,6 +284,10 @@ jobs:
                   PSP_ARCH: ${{ matrix.arch }}
                   PSP_BUILD_WHEEL: 1
 
+            - name: Run df -h
+              if: ${{ runner.os == 'Linux' }}
+              run: df -h
+
             # Windows sucks lol
             - uses: actions/upload-artifact@v4
               if: ${{ runner.os == 'Windows' }}