Give each tracker agent its own config

The tracker-mapping, common-pattern enrichment, and third-party
disambiguation agents were all built from one shared
TrackerAgentsConfig fed by a single tracker-mapping config slot. That
forced a single AgentTimeout to be reused and patched per worker, and
two unrelated max-turns fields to share one struct.

Split the in-code config into TrackerMappingAgentConfig,
TrackerEnrichmentAgentConfig, and DisambiguationAgentConfig, each with
its own timeout and max-turns, and add dedicated tracker-enrichment and
third-party-disambiguation provider slots (the latter resolving next to
third-party-vetter). Enrichment and disambiguation fall back to the
tracker-mapping slot when their own provider is unset, preserving
single-config deployments.

Drop the shared pkg/agentsbuild package and duplicate its small wiring
into probod and proboctl so the two executables stay decoupled. Wire
the new env vars, builder test coverage, and Helm values.

Signed-off-by: Émile Ré <emile@probo.com>

pkg/cookiebanner/tracker_agents_config.go

@@ -20,23 +20,38 @@ import (
 	"go.probo.inc/probo/pkg/llm"
 )
 
-// TrackerAgentsConfig configures the tracker agents that share one LLM
-// client, model, and tool surface: the tracker-mapping agent (catalog
-// identification) and the common-pattern enrichment agent (description
-// research). Both use DB-backed search tools and may also use Firecrawl
-// for web search when an API key is supplied.
+// TrackerMappingAgentConfig configures the tracker-mapping agent
+// (catalog identification). It uses DB-backed search tools and may also
+// use Firecrawl for web search when an API key is supplied.
 //
-// MaxTokens and Temperature bound and steer each LLM call (both
-// outputs are tiny structured JSON). AgentTimeout caps a single agent
-// run, and the per-worker max-turns bound the agent reasoning loop.
-// Zero-valued tuning fields fall back to package defaults.
-type TrackerAgentsConfig struct {
-	LLMClient          *llm.Client
-	Model              string
-	FirecrawlAPIKey    string
-	MaxTokens          *int
-	Temperature        *float64
-	AgentTimeout       time.Duration
-	MappingMaxTurns    int
-	EnrichmentMaxTurns int
+// MaxTokens and Temperature bound and steer the LLM call (the output is
+// tiny structured JSON). Timeout caps a single agent run and MaxTurns
+// bounds the agent reasoning loop. Zero-valued tuning fields fall back
+// to package defaults.
+type TrackerMappingAgentConfig struct {
+	LLMClient       *llm.Client
+	Model           string
+	FirecrawlAPIKey string
+	MaxTokens       *int
+	Temperature     *float64
+	Timeout         time.Duration
+	MaxTurns        int
+}
+
+// TrackerEnrichmentAgentConfig configures the common-pattern enrichment
+// agent (description research). It uses DB-backed search tools and may
+// also use Firecrawl for web search when an API key is supplied.
+//
+// MaxTokens and Temperature bound and steer the LLM call (the output is
+// tiny structured JSON). Timeout caps a single agent run and MaxTurns
+// bounds the agent reasoning loop. Zero-valued tuning fields fall back
+// to package defaults.
+type TrackerEnrichmentAgentConfig struct {
+	LLMClient       *llm.Client
+	Model           string
+	FirecrawlAPIKey string
+	MaxTokens       *int
+	Temperature     *float64
+	Timeout         time.Duration
+	MaxTurns        int
 }