Feat/remove sync api

[jackieismpc]

#541
1.完全移除同步API以及相关代码
2.更新用例以及测试，全部使用异步入口
3.更新版本至0.8.0

[genedna]

@claude

[genedna]

@codex review

[Copilot]

Pull request overview

This PR implements Issue #541 by fully removing Dagrs’ synchronous execution/IO surface and migrating the project to an async-only API, updating examples/tests accordingly, and bumping the crate version to 0.8.0.

Changes:

• Remove legacy sync adapter APIs (e.g., start_with_runtime) and related error variants.
• Remove blocking channel operations and migrate channel closing to async call sites.
• Convert tests/examples to #[tokio::test] / #[tokio::main] and bump version to 0.8.0.

Reviewed changes

Copilot reviewed 32 out of 33 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
project/dagrs/tests/v2_test.rs	Migrates graph execution tests to async #[tokio::test].
project/dagrs/tests/typed_channel_test.rs	Migrates typed-channel tests to async entrypoints.
project/dagrs/tests/router_reuse_test.rs	Converts router reuse test to async execution/reset.
project/dagrs/tests/router_merge_test.rs	Converts router merge test to async execution.
project/dagrs/tests/loop_reset_test.rs	Converts loop reset test flow to async.
project/dagrs/tests/hook_test.rs	Migrates hook/retry tests to async and removes manual runtimes.
project/dagrs/tests/event_test.rs	Converts event broadcast tests to async and simplifies runtime usage.
project/dagrs/tests/checkpoint_test.rs	Converts checkpoint tests to async and removes runtime wrappers.
project/dagrs/tests/chain_skip_test.rs	Converts deadlock/timeout test to async tokio::time::timeout.
project/dagrs/tests/branch_pruning_test.rs	Converts pruning tests to async.
project/dagrs/src/utils/execstate.rs	Removes leftover sync-semaphore commented code.
project/dagrs/src/graph/mod.rs	Updates internal panic cleanup to await async channel-close; removes sync adapter + sync-context guard; updates internal tests to async.
project/dagrs/src/graph/error.rs	Removes BlockingCallInAsyncContext error variant.
project/dagrs/src/connection/out_channel.rs	Removes blocking send/broadcast APIs; makes close APIs async (now awaited by callers).
project/dagrs/src/connection/in_channel.rs	Removes blocking recv/map APIs; consolidates close API to async and introduces async close_all.
project/dagrs/examples/typed_action.rs	Migrates example to #[tokio::main] + async_start().await.
project/dagrs/examples/recv_any_example.rs	Migrates example to #[tokio::main] + async_start().await.
project/dagrs/examples/loop_dag.rs	Migrates example to async main; updates channel close calls to async.
project/dagrs/examples/hello_dagrs_async.rs	Removes redundant async hello example file.
project/dagrs/examples/hello_dagrs.rs	Migrates hello example to async main + async_start().await.
project/dagrs/examples/dagrs-sklearn/tests/dag_job_test.rs	Migrates sklearn example tests to #[tokio::test] and async execution.
project/dagrs/examples/dagrs-sklearn/src/parser/yaml_parser.rs	Small idiomatic cleanups (first(), avoid &p in get_mut).
project/dagrs/examples/dagrs-sklearn/src/parser/mod.rs	Removes unused import and simplifies ParseError conversion.
project/dagrs/examples/dagrs-sklearn/examples/sklearn.rs	Migrates sklearn example to async main; minor idiomatic indexing changes.
project/dagrs/examples/dagrs-sklearn/Cargo.toml	Adds tokio dependency for async macros in examples/tests.
project/dagrs/examples/custom_node.rs	Migrates example to async main + async_start().await.
project/dagrs/examples/conditional_node.rs	Migrates example to async main + async_start().await.
project/dagrs/examples/compute_dag.rs	Migrates example to async main + async_start().await.
project/dagrs/examples/auto_relay.rs	Migrates example to async main + async_start().await.
project/dagrs/docs/CHANGELOG.md	Adds 0.8.0 notes documenting async-only API + removals and migration guidance.
project/dagrs/README.md	Updates documentation to reflect async-only entrypoint and migration notes.
project/dagrs/Cargo.toml	Bumps version to 0.8.0; adds tokio macros feature for async test/main usage.
project/Cargo.lock	Updates lockfile reflecting new dagrs version.

Comments suppressed due to low confidence (1)

project/dagrs/src/connection/out_channel.rs:135

• TypedOutChannels::close is marked async but does not await anything. This can trigger Clippy unused_async and adds an unnecessary .await requirement for callers. Either make it synchronous or introduce a real async operation (or explicitly allow the lint) if you need an async-only API surface.

    /// Close the channel by the given `NodeId`, and remove the channel in this map.
    pub async fn close(&mut self, id: &NodeId) {
        if self.get(id).is_some() {
            self.0.remove(id);
        }
    }

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Keep a non-async send path for LoopCondition

LoopCondition::should_continue is still a synchronous callback (project/dagrs/src/node/loop_node.rs:51), so custom loop controllers cannot switch to send_to(...).await or broadcast(...).await. Removing blocking_send_to here means any existing loop condition that emits a feedback signal or termination token through out now stops compiling with no replacement API; the same regression applies to the removed blocking broadcast helper in this impl.

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