fix(materialize): improve CI test stability and compatibility

This commit addresses several issues to improve Materialize test reliability:

- Update to Materialize v26 syntax: Replace deprecated COUNTER load generator
  with AUCTION, update to FOR ALL TABLES syntax for multi-output sources
- Fix test parallelization: Serialize array, source, and subscribe tests to
  avoid resource contention and subsource name collisions
- Optimize data loading: Cache list_tables() result during CSV loading to
  reduce expensive database calls
- Fix doctest failures: Reduce to 54 doctest +SKIP markers matching postgres
  backend pattern (68% reduction)
- Fix dead fixture warnings: Mark TPC benchmark tests as skipped instead of
  deselecting them to prevent pytest-deadfixtures from flagging their fixtures
- Fix test_map: Make assertion Materialize-specific to avoid breaking other
  backends' pytest diff output
- Remove deprecated enable_load_generator_counter and
  enable_create_table_from_source flags from compose.yaml

Co-Authored-By: Dennis Felsing <[email protected]>

Author: jasonhernandez

.github/workflows/ibis-backends.yml

@@ -168,7 +168,6 @@ jobs:
               - libpq5
           - name: materialize
             title: Materialize
-            serial: true
             services:
               - materialize
             extras:
@@ -346,7 +345,6 @@ jobs:
             backend:
               name: materialize
               title: Materialize
-              serial: true
               services:
                 - materialize
               extras:

compose.yaml

@@ -557,24 +557,19 @@ services:
       - impala
 
   materialize:
-    image: materialize/materialized:v0.160.0
+    image: materialize/materialized:v26.0.0
     ports:
       - 6875:6875 # SQL port
       - 6876:6876 # HTTP port
       - 6874:6874 # Internal port
     environment:
       MZ_LOG: info
       MZ_TELEMETRY: "false"
-      MZ_SYSTEM_PARAMETER_DEFAULT: "max_tables=1000" # Increase from default 200 for testing
+      MZ_SYSTEM_PARAMETER_DEFAULT: "max_tables=1000"
     healthcheck:
-      test:
-        - CMD-SHELL
-        - bash -c 'printf "GET / HTTP/1.1\n\n" > /dev/tcp/127.0.0.1/6875; exit $$?;'
-        - bash -c 'printf "GET / HTTP/1.1\n\n" > /dev/tcp/127.0.0.1:6876; exit $$?;'
-        - bash -c 'printf "GET / HTTP/1.1\n\n" > /dev/tcp/127.0.0.1:6874; exit $$?;'
-      interval: 2s
-      retries: 30
-      timeout: 5s
+      test: ["CMD", "curl", "-f", "localhost:6878/api/readyz"]
+      interval: 1s
+      start_period: 60s
     volumes:
       - materialize:/data
     networks: