apollo_integration_tests,apollo_deployments: prime strk_to_usd_oracle overlays

Goal: PR 4 of 6 in the stack moving the STRK/USD oracle into
L1GasPriceProvider. Lands BEFORE the orchestrator behavior flip
(PR 5) so that every test and deployment overlay already points
the new `strk_to_usd_oracle_config.url_header_list` at a working
endpoint. When PR 5 lands, integration runs immediately exercise
the new path with realistic data instead of silently freezing
fee_proposal at fee_actual.

Change summary:
- `create_node_config` takes a new `strk_to_usd_oracle_config:
  ExchangeRateOracleConfig` argument and plumbs it into
  `L1GasPriceProviderConfig`.
- Callers in `flow_test_setup.rs` and `integration_test_manager.rs`
  reuse the same dummy `spawn_local_eth_to_strk_oracle` URL for both
  oracles (the handler returns a constant rate, so semantically
  equivalent).
- `SecretsConfigOverride` in `apollo_deployments::test_utils` gains
  a `strk_to_usd_oracle_config.url_header_list` field so the
  generated secrets file covers the new private parameter.
- Deployment app-config presets
  (`l1_gas_price_provider_config.json`,
  `replacer_l1_gas_price_provider_config.json`) gain the same three
  per-oracle overrides (`lag_interval_seconds=900`, `max_cache_size=100`,
  `query_timeout_sec=10`) for STRK/USD, mirroring eth_to_strk.

Decision points:
- One dummy oracle process serving both feeds instead of spawning two.
  The fake handler is rate-agnostic — same response shape, single port
  allocation, same join handle. If we ever need rate-specific dummy
  values, splitting into two processes is a localized change.

Action required after merge (cannot run from this sandbox):
- `cargo run --bin update_apollo_node_config_schema` to regenerate
  `config_secrets_schema.json` (it gains a new private parameter
  from PR 1's earlier addition).
- `cargo run --bin deployment_generator` to regenerate
  `testing_secrets.json` with the new strk_to_usd entry from
  `SecretsConfigOverride`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ShahakShama

crates/apollo_deployments/src/test_utils.rs

@@ -27,6 +27,12 @@ pub struct SecretsConfigOverride {
     )]
     l1_gas_price_provider_config_config_eth_to_strk_oracle_config_url_header_list:
         Option<Vec<UrlAndHeaders>>,
+    #[serde(
+        rename = "l1_gas_price_provider_config.strk_to_usd_oracle_config.url_header_list",
+        serialize_with = "serialize_optional_list_with_url_and_headers_wrapper"
+    )]
+    l1_gas_price_provider_config_config_strk_to_usd_oracle_config_url_header_list:
+        Option<Vec<UrlAndHeaders>>,
     #[serde(
         rename = "mempool_p2p_config.network_config.secret_key",
         serialize_with = "serialize_optional_vec_u8_wrapper"
@@ -56,6 +62,12 @@ impl Default for SecretsConfigOverride {
                     headers: Default::default(),
                 }],
             ),
+            l1_gas_price_provider_config_config_strk_to_usd_oracle_config_url_header_list: Some(
+                vec![UrlAndHeaders {
+                    url: Url::parse("https://arbitrary.strk_to_usd_oracle.url").unwrap(),
+                    headers: Default::default(),
+                }],
+            ),
             mempool_p2p_config_network_config_secret_key: None,
             state_sync_config_central_sync_client_config_central_source_config_http_headers: ""
                 .to_string(),

crates/apollo_integration_tests/src/flow_test_setup.rs

@@ -278,6 +278,11 @@ impl FlowSequencerSetup {
         let (eth_to_strk_oracle_url_headers, _join_handle) =
             spawn_local_eth_to_strk_oracle(available_ports.get_next_port());
         let eth_to_strk_oracle_config = ExchangeRateOracleConfig {
+            url_header_list: Some(vec![eth_to_strk_oracle_url_headers.clone().into()]),
+            ..Default::default()
+        };
+        // Reuse the same dummy oracle endpoint for STRK/USD; the handler returns a constant.
+        let strk_to_usd_oracle_config = ExchangeRateOracleConfig {
             url_header_list: Some(vec![eth_to_strk_oracle_url_headers.into()]),
             ..Default::default()
         };
@@ -309,6 +314,7 @@ impl FlowSequencerSetup {
             state_sync_config,
             consensus_manager_config,
             eth_to_strk_oracle_config,
+            strk_to_usd_oracle_config,
             mempool_p2p_config,
             monitoring_endpoint_config,
             component_config,

crates/apollo_integration_tests/src/integration_test_manager.rs

@@ -1367,6 +1367,11 @@ async fn get_sequencer_setup_configs(
             url_header_list: Some(vec![eth_to_strk_oracle_url.clone().into()]),
             ..Default::default()
         };
+        // Reuse the same dummy oracle endpoint for STRK/USD; the handler returns a constant.
+        let strk_to_usd_oracle_config = ExchangeRateOracleConfig {
+            url_header_list: Some(vec![eth_to_strk_oracle_url.clone().into()]),
+            ..Default::default()
+        };
 
         let validator_id = set_validator_id(&mut consensus_manager_config, node_index);
         let chain_info = chain_info.clone();
@@ -1397,6 +1402,7 @@ async fn get_sequencer_setup_configs(
                 state_sync_config.clone(),
                 consensus_manager_config.clone(),
                 eth_to_strk_oracle_config.clone(),
+                strk_to_usd_oracle_config.clone(),
                 mempool_p2p_config.clone(),
                 monitoring_endpoint_config,
                 executable_component_config.clone(),

crates/apollo_integration_tests/src/utils.rs

@@ -267,6 +267,7 @@ pub fn create_node_config(
     mut state_sync_config: StateSyncConfig,
     mut consensus_manager_config: ConsensusManagerConfig,
     eth_to_strk_oracle_config: ExchangeRateOracleConfig,
+    strk_to_usd_oracle_config: ExchangeRateOracleConfig,
     mempool_p2p_config: MempoolP2pConfig,
     monitoring_endpoint_config: MonitoringEndpointConfig,
     components: ComponentConfig,
@@ -313,6 +314,7 @@ pub fn create_node_config(
         // Use newly minted blocks on Anvil to be used for gas price calculations.
         lag_margin_seconds: Duration::from_secs(0),
         eth_to_strk_oracle_config,
+        strk_to_usd_oracle_config,
         ..Default::default()
     };
     let http_server_config =