feat(indexeddb): put event cache store module behind feature flag

Signed-off-by: Michael Goldenberg <m@mgoldenberg.net>

crates/matrix-sdk-indexeddb/Cargo.toml

@@ -14,7 +14,8 @@ default-target = "wasm32-unknown-unknown"
 rustdoc-args = ["--cfg", "docsrs", "--generate-link-to-definition"]
 
 [features]
-default = ["e2e-encryption", "state-store"]
+default = ["e2e-encryption", "state-store", "event-cache-store"]
+event-cache-store = ["dep:matrix-sdk-base"]
 state-store = ["dep:matrix-sdk-base", "growable-bloom-filter"]
 e2e-encryption = ["dep:matrix-sdk-crypto"]
 testing = ["matrix-sdk-crypto?/testing"]
@@ -55,10 +56,17 @@ matrix-sdk-common = { workspace = true, features = ["js"] }
 matrix-sdk-crypto = { workspace = true, features = ["js", "testing"] }
 matrix-sdk-test.workspace = true
 rand.workspace = true
-tracing-subscriber = { workspace = true, features = ["registry", "tracing-log"] }
+tracing-subscriber = { workspace = true, features = [
+    "registry",
+    "tracing-log",
+] }
 uuid.workspace = true
 wasm-bindgen-test.workspace = true
-web-sys = { workspace = true, features = ["IdbKeyRange", "Window", "Performance"] }
+web-sys = { workspace = true, features = [
+    "IdbKeyRange",
+    "Window",
+    "Performance",
+] }
 
 [lints]
 workspace = true

crates/matrix-sdk-indexeddb/src/lib.rs

@@ -6,6 +6,7 @@ use thiserror::Error;
 
 #[cfg(feature = "e2e-encryption")]
 mod crypto_store;
+#[cfg(feature = "event-cache-store")]
 mod event_cache_store;
 mod safe_encode;
 #[cfg(feature = "e2e-encryption")]