feat(role): add versioned role configs + escalation ladder + scheduler (Phase 5)

Two parts:

Part A (fixes a gap from Phase 1): Groq/OpenRouter/OpenAI were documented in
docs/api-keys-setup.md as usable once configured, but nothing actually
constructed runners for them. internal/cli/cloudrunners.go consolidates
anthropic/google/groq/openrouter/openai NativeRunner construction into one
table-driven registerCloudRunners() helper, replacing the two hand-written
per-provider blocks in serve.go/run.go. Groq/OpenRouter/OpenAI reuse
openaicompat (no new adapter code) at SandboxKind: "docker".

Part B: the token-husbanding harness's core routing mechanism.

- internal/role: RoleConfig/Tier/Rung -- a role's system prompt and a
  multi-tier (provider, model) escalation ladder, versioned via config_json.
- storage: new role_configs table (draft/active/retired, UNIQUE(role,
  version)) with transactional activate-retires-prior-active semantics;
  new executions.escalation_rung column.
- task.AgentConfig.Role string -- purely additive; every existing task shape
  (Agent.Role == "") is unaffected, proven by TestPool_Execute_NonRoleTask_Unaffected
  plus the full pre-existing suite passing unchanged.
- executor.Pool.execute(): role-typed tasks with no Agent.Type yet resolve
  tier 0 of their active ladder (round-robin across multi-candidate tiers,
  skipping rate-limited providers, falling back to soonest-clearing) before
  the existing pickAgent/Classifier path runs; SystemPrompt applies to
  Agent.SystemPromptAppend. Already-resolved role tasks (scheduler resubmits)
  get their escalation_rung re-derived read-only via findTierIndex.
- internal/scheduler: polls role-typed FAILED tasks, retries at the same
  rung under MaxRetries or escalates to the next tier's first candidate when
  budget.Accountant.Allow() permits (emitting event.KindEscalated), else
  leaves the task FAILED with a final:true KindEscalated event. An
  in-memory per-execution-ID "handled" set keeps the poll loop convergent.
  Started by `serve` only, config knob [scheduler].poll_interval_seconds.
- internal/api: POST/GET /api/roles/{role}/versions, POST
  /api/roles/{role}/activate -- unauthenticated, matching the existing
  projects/tasks REST endpoints' auth posture (only chatbot MCP, agent MCP,
  and WebSocket are api_token-gated in this codebase today).

Documented as stored-but-not-yet-enforced (CLAUDE.md Design Debt, matching
how task.Priority/RetryConfig are already documented): RoleConfig.Tools/
SandboxKind don't affect dispatch yet; DefaultBudgetUSD is read narrowly as
the scheduler's escalation cost estimate, not enforced at initial dispatch;
scheduler escalation always targets Candidates[0] (no round-robin, unlike
initial-dispatch tier-0 resolution); the scheduler's dedupe is per-process
and resets on restart (idempotent, harmless).

go build/vet/test -race -count=1 all pass, 21 packages.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V1moSNCJRcP6kykA4tyUSs

1 files changed, 91 insertions, 0 deletions

diff --git a/internal/cli/cloudrunners.go b/internal/cli/cloudrunners.go
new file mode 100644
index 0000000..55b3efb
--- /dev/null
+++ b/internal/cli/cloudrunners.go
@@ -0,0 +1,91 @@
+package cli
+
+import (
+	"log/slog"
+	"net/http"
+	"time"
+
+	"github.com/thepeterstone/claudomator/internal/config"
+	"github.com/thepeterstone/claudomator/internal/executor"
+	"github.com/thepeterstone/claudomator/internal/llm"
+	"github.com/thepeterstone/claudomator/internal/provider"
+	"github.com/thepeterstone/claudomator/internal/provider/anthropic"
+	"github.com/thepeterstone/claudomator/internal/provider/google"
+	"github.com/thepeterstone/claudomator/internal/provider/openaicompat"
+)
+
+// cloudProviderSpec describes how to construct a provider.Provider for one
+// cloud provider entry in cfg.Providers, and which RunnersConfig field gates
+// it. anthropic/google use their native wire-format adapters; groq/
+// openrouter/openai are OpenAI-wire-compatible and reuse the Phase 1
+// openaicompat adapter — no dedicated adapter package needed for those three
+// (see docs/api-keys-setup.md).
+type cloudProviderSpec struct {
+	name    string
+	enabled func(config.RunnersConfig) bool
+	build   func(pc config.ProviderConfig, timeout time.Duration) provider.Provider
+}
+
+func openaiCompatBuild(pc config.ProviderConfig, timeout time.Duration) provider.Provider {
+	return openaicompat.New(&llm.Client{
+		Endpoint:   pc.Endpoint,
+		Model:      pc.DefaultModel,
+		APIKey:     pc.APIKey,
+		HTTPClient: &http.Client{Timeout: timeout},
+	})
+}
+
+var cloudProviderSpecs = []cloudProviderSpec{
+	{
+		name:    "anthropic",
+		enabled: config.RunnersConfig.AnthropicEnabled,
+		build: func(pc config.ProviderConfig, timeout time.Duration) provider.Provider {
+			return anthropic.New(pc.APIKey, pc.Endpoint, timeout)
+		},
+	},
+	{
+		name:    "google",
+		enabled: config.RunnersConfig.GoogleEnabled,
+		build: func(pc config.ProviderConfig, timeout time.Duration) provider.Provider {
+			return google.New(pc.APIKey, pc.Endpoint, timeout)
+		},
+	},
+	{name: "groq", enabled: config.RunnersConfig.GroqEnabled, build: openaiCompatBuild},
+	{name: "openrouter", enabled: config.RunnersConfig.OpenRouterEnabled, build: openaiCompatBuild},
+	{name: "openai", enabled: config.RunnersConfig.OpenAIEnabled, build: openaiCompatBuild},
+}
+
+// registerCloudRunners constructs and adds a NativeRunner (SandboxKind:
+// "docker", matching the original anthropic/google-only wiring — cloud
+// providers get real container isolation, not the weaker HostSandbox local
+// runners use) into runners for every cloud provider in cloudProviderSpecs
+// that has a non-empty cfg.Providers[name].APIKey and is enabled via its
+// RunnersConfig.<Name>Enabled() gate. Called identically from both `serve`
+// and `run` — the only difference between them (logDir) is a parameter, and
+// neither command does anything provider-specific beyond this.
+func registerCloudRunners(runners map[string]executor.Runner, cfg *config.Config, logger *slog.Logger, logDir string) {
+	for _, spec := range cloudProviderSpecs {
+		pc, ok := cfg.Providers[spec.name]
+		if !ok || pc.APIKey == "" || !spec.enabled(cfg.Runners) {
+			continue
+		}
+		timeout := time.Duration(0)
+		if pc.TimeoutSeconds > 0 {
+			timeout = time.Duration(pc.TimeoutSeconds) * time.Second
+		}
+		runners[spec.name] = &executor.NativeRunner{
+			Provider:     spec.build(pc, timeout),
+			Logger:       logger,
+			LogDir:       logDir,
+			DefaultModel: pc.DefaultModel,
+			// Native cloud providers get real container isolation
+			// (sandbox.DockerSandbox) rather than HostSandbox's host-side
+			// path-prefix confinement — see NativeRunner.SandboxKind doc.
+			SandboxKind:  "docker",
+			SandboxImage: cfg.SandboxImage,
+		}
+		if logger != nil {
+			logger.Info(spec.name+" runner registered", "default_model", pc.DefaultModel, "sandbox", "docker")
+		}
+	}
+}