ci(conformance): run the draft-spec server suite

Add a workflow step that runs the test:conformance:server:draft script after
the existing active-suite step. The client job already covers the draft
client scenarios via --suite all; add comments documenting that and the
exact-version conformance pin.

Both jobs intentionally stay continue-on-error: true for now; the comment in
the workflow recommends removing it once the expected-failures baseline has
proven stable so that unexpected failures and stale entries actually block.

Author: felixweinberger

.github/workflows/conformance.yml

@@ -1,5 +1,14 @@
 name: Conformance Tests
 
+# The conformance framework (@modelcontextprotocol/conformance) is pinned to an
+# exact version in test/conformance/package.json; new conformance releases are
+# adopted by deliberately bumping that pin (+ pnpm-lock.yaml). This workflow
+# stays as-is across bumps.
+#
+# Both jobs are still continue-on-error: true (advisory). Recommended next
+# step once the expected-failures baseline has proven stable: remove
+# continue-on-error so unexpected failures and stale baseline entries block.
+
 on:
     push:
         branches: [main]
@@ -30,7 +39,11 @@ jobs:
                   cache-dependency-path: pnpm-lock.yaml
             - run: pnpm install
             - run: pnpm run build:all
-            - run: pnpm run test:conformance:client:all
+            # --suite all already includes the draft-spec client scenarios
+            # (SEP-2575, SEP-2322, SEP-2243, SEP-2106, draft auth); known gaps
+            # are listed in test/conformance/expected-failures.yaml.
+            - name: Run client conformance (all suites, incl. draft)
+              run: pnpm run test:conformance:client:all
 
     server-conformance:
         runs-on: ubuntu-latest
@@ -48,4 +61,11 @@ jobs:
                   cache-dependency-path: pnpm-lock.yaml
             - run: pnpm install
             - run: pnpm run build:all
-            - run: pnpm run test:conformance:server
+            # Dated-spec (active) suite: expected to stay fully green.
+            - name: Run server conformance (active suite)
+              run: pnpm run test:conformance:server
+            # Draft-spec suite (SEP-2575 stateless, SEP-2322 MRTR, SEP-2549,
+            # SEP-2243): known gaps are listed in expected-failures.yaml and
+            # must be removed from the baseline as each milestone lands.
+            - name: Run server conformance (draft suite)
+              run: pnpm --filter @modelcontextprotocol/test-conformance run test:conformance:server:draft