fix: Make sqlite-sync feature optional for crates.io publishing

sqlite-watcher is a local path dependency not published to crates.io.
Make it optional via sqlite-sync feature (enabled by default for
binaries) so cargo publish succeeds.

- Add sqlite-sync feature gating sqlite-watcher dependency
- Gate SyncSqlite command and module behind feature
- Update release workflow to publish with --no-default-features

Author: taariq

.github/workflows/release.yml

@@ -184,4 +184,6 @@ jobs:
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
         run: |
-          cargo publish --no-verify --allow-dirty
+          # Publish without sqlite-sync feature since sqlite-watcher is not on crates.io
+          # Users get full functionality via GitHub releases; crates.io gets core features
+          cargo publish --no-verify --allow-dirty --no-default-features

Cargo.lock

@@ -54,7 +54,11 @@ libc = "0.2"
 rust_decimal = { version = "1.39", features = ["db-tokio-postgres"] }
 tonic = { version = "0.11", features = ["transport"] }
 tower = "0.4"
-sqlite-watcher = { path = "sqlite-watcher" }
+sqlite-watcher = { path = "sqlite-watcher", optional = true }
+
+[features]
+default = ["sqlite-sync"]
+sqlite-sync = ["sqlite-watcher"]
 
 [patch.crates-io]
 fxhash = { path = "third-party/fxhash" }

Cargo.toml

@@ -4,6 +4,7 @@
 pub mod init;
 pub mod status;
 pub mod sync;
+#[cfg(feature = "sqlite-sync")]
 pub mod sync_sqlite;
 pub mod target;
 pub mod validate;

src/commands/mod.rs

@@ -4,6 +4,7 @@
 use anyhow::Context;
 use clap::{Args, Parser, Subcommand};
 use database_replicator::commands;
+#[cfg(feature = "sqlite-sync")]
 use std::path::PathBuf;
 
 #[derive(Parser)]
@@ -178,6 +179,7 @@ enum Commands {
         daemon_status: bool,
     },
     /// Consume sqlite-watcher change batches and apply them to SerenDB JSONB tables
+    #[cfg(feature = "sqlite-sync")]
     SyncSqlite {
         /// Target PostgreSQL/Seren connection string
         #[arg(long)]
@@ -767,6 +769,7 @@ async fn main() -> anyhow::Result<()> {
             )?;
             commands::verify(&source, &target, Some(filter)).await
         }
+        #[cfg(feature = "sqlite-sync")]
         Commands::SyncSqlite {
             target,
             watcher_endpoint,