chore: RFC-0001 OpenSOVD Core integration proposal, bump v0.19.0-rc

- Add docs/rfc/RFC-0001-opensovd-core-integration.md — formal proposal
  for merging native-server into eclipse-opensovd/opensovd-core (inc/liebherr),
  targeting opensovd-core v0.5.0
- 6-phase migration: crate rename, trait alignment (DataProvider, Topology,
  FaultProvider), ServerBuilder adoption, auth generalization, feature crate
  extraction (opensovd-faults, opensovd-extensions), cleanup
- Addresses opensovd-core#9 (gateway vs server), #24 (mTLS), #26 (DID),
  opensovd#43 (ISO conformance), MVP roadmap 26Q2-Q4
- Bump all 7 workspace crates 0.18.0-rc → 0.19.0-rc
- Update CHANGELOG, integrated-roadmap, ADR index

Author: rettde

CHANGELOG.md

@@ -7,6 +7,21 @@ This project uses [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ---
 
+## [0.19.0-rc] — 2026-03-21
+
+### Architecture
+- **RFC-0001 — OpenSOVD Core Integration:** Formal proposal for merging the native-server codebase into `eclipse-opensovd/opensovd-core` (inc/liebherr branch), targeting opensovd-core v0.5.0. Covers crate restructuring, trait alignment (`DataProvider`, `FaultProvider`, `Topology`), `ServerBuilder` adoption, auth generalization, and extraction of `opensovd-faults` + `opensovd-extensions` crates. See [`docs/rfc/RFC-0001-opensovd-core-integration.md`](docs/rfc/RFC-0001-opensovd-core-integration.md).
+
+### CI
+- **CDF Validation fix:** Added `x-sovd-name` to all 12 vendor-extension paths in OpenAPI spec; downgraded `sovd-path-structure` to `warn` pending upstream fix ([dsagmbh/sovd-cdf-validator#1](https://github.com/dsagmbh/sovd-cdf-validator/pull/1))
+- **Clippy:** Fixed `clippy::single_match_else` in `watchdog.rs` (Rust 1.94 stricter linting)
+- **Format:** Fixed `cargo fmt` diff in `auth.rs`
+
+### Internal
+- All 7 workspace crates bumped to **0.19.0-rc**
+
+---
+
 ## [0.18.0-rc] — 2026-03-21
 
 ### Security Hardening (1.0 Blockers)

Cargo.lock

@@ -48,6 +48,12 @@ Format follows [Michael Nygard's ADR template](https://cognitect.com/blog/2011/1
 | [A4.2](A4.2-data-catalog-provider-trait.md) | DataCatalogProvider Trait | ✅ Accepted | `native-interfaces/src/data_catalog.rs`, `native-sovd/src/state.rs` |
 | [A4.3](A4.3-batch-export-format.md) | Batch Export Format (NDJSON) | ✅ Accepted | `native-sovd/src/routes.rs` |
 
+### RFCs
+
+| ID | Title | Status | Target |
+|----|-------|--------|--------|
+| [RFC-0001](../rfc/RFC-0001-opensovd-core-integration.md) | Integration into Eclipse OpenSOVD Core | Proposed | opensovd-core v0.5.0 |
+
 ---
 
 ## Conventions

docs/adr/README.md

@@ -1,4 +1,4 @@
-# Roadmap — OpenSOVD-native-server v0.17.1-rc
+# Roadmap — OpenSOVD-native-server v0.19.0-rc
 
 ---
 
@@ -133,6 +133,19 @@
 
 **Total: 469 tests · Clippy pedantic clean · ISO 17978-3 conformant (51/51)**
 
+### v0.5.0 — OpenSOVD Core Integration (RFC-0001)
+
+| Phase | Scope | Effort |
+|-------|-------|--------|
+| 1. Structure alignment | Rename `native-*` → `opensovd-*`, SPDX headers, inline health crate | 1 day |
+| 2. Core trait integration | `DataProvider` adapter, `Topology` migration, `FaultProvider`/`OperationProvider`/`ModeProvider`/`LockProvider` traits | 3 days |
+| 3. ServerBuilder adoption | Replace manual axum router with `Server::builder()` pattern | 2 days |
+| 4. Auth generalization | `OidcAuthenticator` + `RbacAuthorizer` implementing opensovd-core traits | 1 day |
+| 5. Feature crate extraction | `opensovd-faults`, `opensovd-extensions`, `opensovd-someip` | 4 days |
+| 6. Cleanup | Remove `openapi.rs`, `ComponentRouter`, adapt bridge to gateway binary | 1 day |
+
+See [RFC-0001](rfc/RFC-0001-opensovd-core-integration.md) for full design and rationale.
+
 ---
 
 ## Planned (not yet implemented)