docs(review): add code review for Driver.OpcUaClient.Session

No defects found across all 10 checklist categories. NamespaceMap's
namespace-URI-stable NodeId encoding and v3 RawPath resolution table match
docs/v2/driver-specs.md §8 and are exercised by
OpcUaClientNamespaceTests.cs. Zero findings recorded.

code-reviews/Driver.OpcUaClient.Session/findings.md

@@ -0,0 +1,29 @@
+# Code Review — Driver.OpcUaClient.Session
+
+| Field | Value |
+|---|---|
+| Module | `src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Session` |
+| Reviewer | Claude (automated review agent) |
+| Review date | 2026-08-10 |
+| Commit reviewed | `b990adae` |
+| Status | Reviewed |
+| Open findings | 0 |
+
+## Checklist coverage
+
+| # | Category | Result |
+|---|---|---|
+| 1 | Correctness & logic bugs | No issues found. `ToStableReference`/`TryResolve` correctly implement the namespace-URI-stable NodeId encoding described in `docs/v2/driver-specs.md` §8: namespace 0 keeps the compact `i=…` form (spec-fixed, never reorders), a nonzero namespace is rewritten to `nsu=<uri>;<idType>=<identifier>`, an out-of-range namespace index falls back to the raw form rather than throwing, and the static session-based `TryResolve` re-binds a captured `nsu=…` reference against the CURRENT session's namespace table (correcting a post-connect reorder) while still accepting a plain `ns=N;…` form for hand-authored config. `BuildRawPathTable`'s per-entry skip rules (blank RawPath, unreadable/absent `nodeId`) match what the class doc promises ("the driver surfaces such a reference as `BadNodeIdInvalid`") and what `OpcUaClientNamespaceTests.cs` exercises. |
+| 2 | OtOpcUa conventions | No issues found. Uses the OPC Foundation UA .NET Standard stack's own types (`Opc.Ua.NodeId`, `NamespaceTable`, `ISession`) exactly as intended rather than re-deriving namespace semantics by hand; .NET 10/AnyCPU; no Galaxy/MXAccess surface (not applicable to this module). |
+| 3 | Concurrency & thread safety | No issues found. `NamespaceMap` is effectively immutable after construction (`_uris`, `_uriToIndex`, `_rawPathToNode` are all populated once in the constructor from freshly-built collections that are never exposed for external mutation), so concurrent reads from multiple threads after a connect are safe with no locking needed. A reconnect is expected to build a fresh `NamespaceMap` instance (out of this module's scope to verify the call site, but nothing in this class assumes otherwise). |
+| 4 | Error handling & resilience | No issues found. Every public entry point follows the `TryXxx` contract consistently: `TryResolve` (both the instance RawPath overload and the static session-based overload) returns `false` rather than throwing for null/blank/unknown input, and the static overload's `NodeId.Parse` call is wrapped in a `try/catch` that treats any parse failure as a clean `false` — including a concurrently-torn-down session, which the XML doc calls out explicitly as an expected caller scenario on the reconnect path. |
+| 5 | Security | No issues found. No secrets, no network I/O of its own (session I/O is owned by the consuming driver), no injection surface — this is a pure in-memory table + string-encoding helper. |
+| 6 | Performance & resource management | No issues found. `Count`/`UriForIndex`/`IndexForUri`/`TryResolve`/`TryGetBinding` are all O(1) dictionary/array lookups; `FromSession`/`FromTable` do one O(n) pass over the namespace table and one O(m) pass over the authored raw tags, both proportional to input size with no redundant work. No `IDisposable` state to manage (nothing here owns a session, socket, or other unmanaged resource). |
+| 7 | Design-document adherence | No issues found. The "why this type sits in `.Session` and not `.Contracts`" remark accurately describes the actual dependency shape (`.Contracts` stays free of the `OPCFoundation.NetStandard.Opc.Ua.Client` package; the blob read (`OpcUaClientTagDefinitionFactory.TryReadNodeId`) stays in `.Contracts` as the one authority the deploy-time gate and this table share) — confirmed by reading the referenced `.Contracts` factory and its call site here (`BuildRawPathTable`, line 134). |
+| 8 | Code organization & conventions | No issues found. Single-file, single-responsibility extraction exactly as described in `CLAUDE.md`'s summary of this module ("a small shared-helper project ... so the OpcUaClient Browser and driver could share namespace-mapping logic without the Browser referencing the runtime driver") — confirmed the module has no dependency on `Driver.OpcUaClient` itself, only on `Core.Abstractions` (`RawTagEntry`) and the OPC UA SDK. |
+| 9 | Testing coverage | No issues found. `tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Tests/OpcUaClientNamespaceTests.cs` covers the encoding contract (namespace-0 compact form, nonzero-namespace URI encoding, unknown-index fallback, bidirectional index/URI lookup), the v3 RawPath resolution table (successful resolution, unknown/blank RawPath, `WriteIdempotent` threading, an entry with no usable `nodeId` being skipped, legacy PascalCase `NodeId` key tolerance, an empty-raw-tags map), and the null-session negative case of the static session-based `TryResolve`. The success path of the static session-based `TryResolve` (a real, non-null `ISession`) is not exercised in this module's own test file — reasonably so, since constructing a live/fake `ISession` from the SDK is impractical to do in isolation here; it is exercised end-to-end via the consuming driver's integration test suites (`Driver.OpcUaClient.IntegrationTests`, `Driver.OpcUaClient.Browser.IntegrationTests`), which is out of this review's module scope to inspect further. |
+| 10 | Documentation & comments | No issues found. The class- and member-level XML docs are thorough and verifiably accurate against the implementation (the namespace-reorder rationale, the `nsu=…`/`ns=N;…` dual-form acceptance, the RawPath v3 resolution table's relationship to `TagConfig.nodeId`, and the `.Session`-vs-`.Contracts` placement rationale all match what the code actually does). |
+
+## Findings
+
+_No findings recorded — no defects, coverage gaps, or design-adherence issues were found in this module at the reviewed commit. See the checklist notes above for the review evidence per category._