feat(state-prune): support tail replay on existing output (#3991)

* fix(replay): finalize existing output without reopening db

* feat(state-prune): add tail replay for existing output

* feat(state-prune): allow skipping replay compact

* feat(db): import missing indexed l2 transactions

* fix(db): avoid target indexer init in import

* fix(state-prune): address replay review feedback

* Avoid crates.io installs for CI cargo tools

* Reuse prebaked Rust and accept downloaded artifacts

* Reduce self-hosted Rust bootstrap and validation load

* Proxy rust toolchain downloads on self-hosted

* Stabilize self-hosted Rust jobs

* ci: reduce self-hosted runner bootstrap load

* ci: remove stale proxy from cross-platform check

* ci: skip cross-platform check on pull requests

* fix(examples): use local framework dependencies

Author: jolestar

.github/actions/rust-setup/action.yaml

@@ -1,6 +1,23 @@
 runs:
   using: composite
   steps:
+    - id: preinstalled
+      run: |
+        set -euo pipefail
+        if command -v rustc >/dev/null 2>&1 \
+          && command -v cargo >/dev/null 2>&1 \
+          && cargo fmt --version >/dev/null 2>&1 \
+          && cargo clippy --version >/dev/null 2>&1; then
+          echo "available=true" >> "$GITHUB_OUTPUT"
+          rustc --version
+          cargo --version
+          cargo fmt --version
+          cargo clippy --version
+        else
+          echo "available=false" >> "$GITHUB_OUTPUT"
+        fi
+      shell: bash
+
     - run: |
         set -euo pipefail
         packages=(
@@ -44,5 +61,6 @@ runs:
       shell: bash
 
     - uses: dtolnay/rust-toolchain@1.91.1
+      if: ${{ steps.preinstalled.outputs.available != 'true' }}
       with:
         components: rustfmt, clippy