feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

infra/secret.ts

@@ -0,0 +1,14 @@
+sst.Linkable.wrap(random.RandomPassword, (resource) => ({
+  properties: {
+    value: resource.result,
+  },
+}))
+
+export const SECRET = {
+  R2AccessKey: new sst.Secret("R2AccessKey", "unknown"),
+  R2SecretKey: new sst.Secret("R2SecretKey", "unknown"),
+  HoneycombApiKey: new sst.Secret("HONEYCOMB_API_KEY"),
+  HoneycombWebhookSecret: new random.RandomPassword("HoneycombWebhookSecret", { length: 24 }),
+  UpstashRedisRestUrl: new sst.Secret("UpstashRedisRestUrl"),
+  UpstashRedisRestToken: new sst.Secret("UpstashRedisRestToken"),
+}