Use pending flashblocks state for bundle metering

Integrate flashblocks state into metering to execute bundles on top of
pending flashblock state rather than canonical block state. This ensures
metered gas usage and execution time accurately reflect the effects of
pending transactions (nonces, balances, storage, code changes).

Implementation:
- Add flashblocks-rpc dependency to metering crate
- Update meter_bundle() to accept optional db_cache parameter
- Implement three-layer state architecture:
  1. StateProviderDatabase (canonical block base state)
  2. CacheDB (applies flashblock pending changes via cache)
  3. State wrapper (for EVM builder compatibility)
- Update MeteringApiImpl to accept FlashblocksState
- Get pending blocks and db_cache from flashblocks when available
- Fall back to canonical block state when no flashblocks available
- Update response to include flashblock_index in logs
- Require flashblocks to be enabled for metering RPC
- Update all tests to pass FlashblocksState parameter

The metering RPC now uses the same state as flashblocks eth_call,
ensuring consistent simulation results.

Author: niran

Cargo.lock

@@ -47,7 +47,7 @@ base-reth-transaction-tracing = { path = "crates/transaction-tracing" }
 
 # base/tips
 # Note: default-features = false avoids version conflicts with reth's alloy/op-alloy dependencies
-tips-core = { git = "https://github.com/base/tips", rev = "e59327bec565808e0505d3fb3a64749dfc61a41a", default-features = false }
+tips-core = { git = "https://github.com/base/tips", rev = "86b275c0fd63226c3fb85ac5512033f99b67d0f5", default-features = false }
 
 # reth
 reth = { git = "https://github.com/paradigmxyz/reth", tag = "v1.8.2" }
@@ -79,6 +79,7 @@ reth-ipc = { git = "https://github.com/paradigmxyz/reth", tag = "v1.8.2" }
 # revm
 revm = { version = "29.0.0", default-features = false }
 revm-bytecode = { version = "6.2.2", default-features = false }
+revm-database = { version = "7.0.5", default-features = false }
 
 # alloy
 alloy-primitives = { version = "1.3.1", default-features = false, features = [

Cargo.toml

@@ -29,6 +29,9 @@ reth-primitives.workspace = true
 reth-primitives-traits.workspace = true
 reth-exex.workspace = true
 
+# revm
+revm-database.workspace = true
+
 # alloy
 alloy-primitives.workspace = true
 alloy-eips.workspace = true