feat(scheduling): cron job setup + smart triggers (Phase 7 foundation)

[bjridicodes]

Roadmap Phase 7 — setup cron scheduling. Smart triggers: skip run if last 3 returned same jobs (search saturated), run more frequently after target company fundraising announcement.

[bjridicodes]

Relationships

Depends on:

• feat(resilience): partial-failure recovery with LangGraph checkpointing #28 — partial failure recovery required before running unattended
• feat(resilience): circuit breakers for failing connectors #29 — circuit breakers required before running unattended
• feat(notifications): daily digest mode instead of per-run #35 — digest mode required to avoid Telegram spam on every cron tick

Blocks:

• feat(distribution): Docker container + GitHub Actions cron workflow #31 — GitHub Actions workflow is built on the validated local cron logic