Merge pull request #16 from aimdb-dev/3-core-dberror-type-definition

3 core dberror type definition

Author: lxsaah

CONTRIBUTING.md

@@ -49,6 +49,16 @@ AimDB is an async, in-memory database designed for real-time data synchronizatio
 - `make doc` - Generate and open documentation
 - `make clean` - Clean build artifacts
 
+### Security and License Auditing
+
+AimDB uses `cargo deny` for dependency auditing:
+
+```bash
+cargo deny check          # Full audit (advisories, licenses, bans)
+cargo deny check licenses # License compliance only
+cargo deny check advisories # Security advisories only
+```
+
 ## Code Standards
 
 ### Rust Guidelines
@@ -170,7 +180,12 @@ cargo test test_name --all-features
    make test
    ```
 
-3. **Check documentation:**
+3. **Check license compliance:**
+   ```bash
+   cargo deny check  # Verify dependencies meet license requirements
+   ```
+
+4. **Check documentation:**
    ```bash
    make doc
    ```
@@ -229,6 +244,38 @@ examples/quickstart/ # Demo application
 - **Discussions**: Use GitHub discussions for general questions
 - **Code Review**: All PRs require review before merging
 
+## License Compliance
+
+### Dependency Licensing
+
+AimDB follows a permissive licensing strategy compatible with commercial use. The project accepts dependencies with these licenses:
+
+- **Primary**: MIT, Apache-2.0 (preferred for new dependencies)
+- **Compatible**: BSD-2-Clause, BSD-3-Clause, ISC
+- **Unicode Data**: Unicode-3.0, Unicode-DFS-2016 (for Unicode processing crates)
+
+### Adding Dependencies
+
+Before adding new dependencies:
+
+1. **Check the license** with `cargo deny check`
+2. **Ensure compatibility** with our allowed licenses in `deny.toml`
+3. **Avoid copyleft licenses** (GPL, LGPL, etc.) that could restrict commercial use
+4. **Document the rationale** for any new license additions in your PR
+
+If you need to add a dependency with a new license:
+- Verify it's OSI-approved and business-friendly
+- Update `deny.toml` to include the new license
+- Explain the necessity in your PR description
+
+### License Audit
+
+Run license checks as part of development:
+```bash
+cargo deny check licenses  # Check license compliance
+make check                 # Includes all development checks
+```
+
 ## Code of Conduct
 
 Please be respectful and constructive in all interactions. We're building this project together and want everyone to feel welcome to contribute.

Cargo.lock

@@ -4,7 +4,7 @@ members = [
     "aimdb-connectors",
     "aimdb-adapters",
     "tools/aimdb-cli",
-    "examples"
+    "examples",
 ]
 resolver = "2"
 
@@ -27,7 +27,7 @@ tokio = { version = "1.0", features = ["macros", "rt-multi-thread"] }
 serde = { version = "1.0", features = ["derive"] }
 
 # Error handling
-thiserror = "1.0"
+thiserror = "2.0.16"
 
 # Basic observability
 tracing = "0.1"
@@ -43,4 +43,4 @@ tokio-test = "0.4"
 
 [workspace.metadata.docs.rs]
 all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
+rustdoc-args = ["--cfg", "docsrs"]

Cargo.toml

@@ -5,4 +5,14 @@ edition.workspace = true
 license.workspace = true
 description = "Core database engine for AimDB - async in-memory storage with real-time synchronization"
 
+[features]
+default = ["std"]
+std = ["thiserror"]
+
 [dependencies]
+# Error handling - only for std environments
+thiserror = { workspace = true, optional = true }
+
+[dev-dependencies]
+# For no_std testing
+heapless = "0.9.1"