feat(orchestrator): rewrite main.go to use pipeline.Construct

Replace ~500 lines of manual wiring with a single pipeline.Construct
call. The orchestrator's run() now:

1. Builds per-queue profiles (Profile/Profiles in profiles.go)
2. Populates orchestrator.Deps with profile-derived Factory adapters
3. Calls pipeline.Construct(deps, orchestrator.Stages, ...) to get a
   single lifecycle.Component
4. Drives Start/Stop on that component

Removed:
- newTopicRegistry (topology now declared in orchestrator.Stages)
- queueExtensions/queueRegistry (replaced by Profile/Profiles)
- Three *Factory adapter structs (replaced by func-type adapters)
- registerPrimaryControllers (stages declare their own New funcs)
- registerDLQControllers (stages declare their own DLQ funcs)

The host retains: infrastructure bootstrap, per-queue profile
construction, change provider wiring, gRPC server lifecycle, and
signal handling — all host-specific concerns per the RFC.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: JamyDev

service/submitqueue/orchestrator/server/BUILD.bazel

@@ -7,24 +7,21 @@ exports_files(
 
 go_library(
     name = "orchestrator_lib",
-    srcs = ["main.go"],
+    srcs = [
+        "main.go",
+        "profiles.go",
+    ],
     importpath = "github.com/uber/submitqueue/service/submitqueue/orchestrator/server",
     visibility = ["//visibility:private"],
     deps = [
-        "//api/runway/messagequeue:go_default_library",
         "//api/submitqueue/orchestrator/protopb:go_default_library",
-        "//platform/consumer:go_default_library",
-        "//platform/errs:go_default_library",
         "//platform/errs/generic:go_default_library",
         "//platform/errs/mysql:go_default_library",
-        "//platform/extension/counter:go_default_library",
         "//platform/extension/counter/mysql:go_default_library",
-        "//platform/extension/messagequeue:go_default_library",
         "//platform/extension/messagequeue/mysql:go_default_library",
         "//platform/http:go_default_library",
+        "//platform/pipeline:go_default_library",
         "//submitqueue/core/changeset:go_default_library",
-        "//submitqueue/core/topickey:go_default_library",
-        "//submitqueue/entity:go_default_library",
         "//submitqueue/extension/buildrunner:go_default_library",
         "//submitqueue/extension/buildrunner/fake:go_default_library",
         "//submitqueue/extension/changeprovider:go_default_library",
@@ -37,26 +34,9 @@ go_library(
         "//submitqueue/extension/conflict/fake:go_default_library",
         "//submitqueue/extension/conflict/fileoverlap:go_default_library",
         "//submitqueue/extension/conflict/none:go_default_library",
-        "//submitqueue/extension/scorer:go_default_library",
-        "//submitqueue/extension/scorer/composite:go_default_library",
-        "//submitqueue/extension/scorer/fake:go_default_library",
-        "//submitqueue/extension/scorer/heuristic:go_default_library",
-        "//submitqueue/extension/storage:go_default_library",
         "//submitqueue/extension/storage/mysql:go_default_library",
         "//submitqueue/extension/validator/fake:go_default_library",
-        "//submitqueue/orchestrator/controller:go_default_library",
-        "//submitqueue/orchestrator/controller/batch:go_default_library",
-        "//submitqueue/orchestrator/controller/build:go_default_library",
-        "//submitqueue/orchestrator/controller/buildsignal:go_default_library",
-        "//submitqueue/orchestrator/controller/cancel:go_default_library",
-        "//submitqueue/orchestrator/controller/conclude:go_default_library",
-        "//submitqueue/orchestrator/controller/dlq:go_default_library",
-        "//submitqueue/orchestrator/controller/merge:go_default_library",
-        "//submitqueue/orchestrator/controller/mergeconflictsignal:go_default_library",
-        "//submitqueue/orchestrator/controller/mergesignal:go_default_library",
-        "//submitqueue/orchestrator/controller/speculate:go_default_library",
-        "//submitqueue/orchestrator/controller/start:go_default_library",
-        "//submitqueue/orchestrator/controller/validate:go_default_library",
+        "//submitqueue/orchestrator:go_default_library",
         "@com_github_go_sql_driver_mysql//:go_default_library",
         "@com_github_uber_go_tally//:go_default_library",
         "@org_golang_google_grpc//:go_default_library",