fix(coding-agents): stagger daily page refresh schedules

[altaywtf]

A shared daily cron makes every coding-agent knowledge page refresh at once, allowing refresh work to delay ingestion. Add opt-in pageTriggerType: "daily-staggered" so new standard and initiative pages receive a stable per-bank/page UTC schedule; existing schedules remain untouched.

Tag-policy reconciliation now patches only tags_match, preserving manually edited schedules instead of replacing the whole trigger.

Validation: 848 tests across 64 files passed, package build and TypeScript checks passed, repository lint passed, and generated skill/docs were refreshed. The tag-repair regression fails against the previous full-trigger patch. One independent slopguard review passed with no findings. Hashing distributes schedules approximately; collisions remain possible.

[Copilot]

🟢 Approval recommended

The changes are localized, covered by targeted tests for the new scheduling mode and the tag-only patch behavior, and align with the server’s trigger-as-patch semantics to avoid clobbering manual schedules.

Pull request overview

Adds an opt-in “daily-staggered” knowledge-page refresh mode for the coding-agents integration so new pages refresh once per day on a stable, per-bank/per-page UTC schedule (instead of all pages sharing the same daily cron), and updates reconciliation logic to avoid overwriting manually edited schedules.

Changes:

• Introduces pageTriggerType: "daily-staggered" and computes a stable per-bank/page daily cron minute via hashing at page creation time.
• Extends page-trigger plumbing to allow a per-page trigger factory (PageTriggerSource) so seed/initiative creation can pass page identity into trigger construction.
• Changes tag-policy reconciliation to patch only trigger.tags_match (not the full trigger), preserving existing refresh_cron / schedules.

File summaries

File	Description
hindsight-integrations/coding-agents/src/mcp-server.ts	Threads per-page trigger factory into tool selection so page identity can be used for staggered schedules.
hindsight-integrations/coding-agents/src/deepen.ts	Configures banks with a per-page trigger factory (enables staggered scheduling during seeding).
hindsight-integrations/coding-agents/src/core/runtime.ts	Uses per-page trigger factory when building knowledge tools in the runtime core.
hindsight-integrations/coding-agents/src/core/missions.ts	Adds daily-staggered trigger mode, PageIdentity, and PageTriggerSource; hashes bank+path into a daily cron time.
hindsight-integrations/coding-agents/src/core/missions.test.ts	Adds deterministic tests for staggered scheduling and updates config-type wording.
hindsight-integrations/coding-agents/src/core/knowledge-tools.ts	Updates types to accept PageTriggerSource and passes it through to initiative capture.
hindsight-integrations/coding-agents/src/core/hindsight.ts	Applies per-page trigger during seeding/initiative creation and patches only tags_match on reconciliation to preserve manual schedules.
hindsight-integrations/coding-agents/src/core/hindsight.pages.test.ts	Adds regression coverage for staggered seeding + schedule preservation and for tag-only trigger patching.
hindsight-integrations/coding-agents/src/core/config.ts	Extends config resolution/types to support pageTriggerType: "daily-staggered".
hindsight-integrations/coding-agents/skill/SKILL.md	Documents the new daily-staggered option and behavior.
hindsight-integrations/coding-agents/README.md	Documents the new daily-staggered option and behavior (source for generated artifacts).
hindsight-docs/docs-integrations/coding-agents.md	Updates published docs to include daily-staggered configuration and semantics.

Review details

• Files reviewed: 12/12 changed files
• Comments generated: 0
• Review effort level: Lite

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[nicoloboschi]

superseded by #4208