refactor: centralize DateFilter utility for upcoming/past logic

[chubes4]

Summary

Extracts the duplicated upcoming/past condition logic into a single DateFilter utility class with two output formats:

• meta_query() — WP_Query arrays (used by EventQueryBuilder)
• sql() — raw SQL joins + WHERE fragments (used by Taxonomy_Helper, calendar-stats, PageBoundary)

Before: the definition of "upcoming" was copy-pasted in 4 places across 2 repos. Changing it required updating all of them (which is exactly the bug that caused the wrong counts).

After: one class, one definition. Change it once, every consumer gets the update.

             ┌──────────────┐
             │  DateFilter   │
             │               │
             │ upcoming_meta_query()
             │ upcoming_sql()
             │ past_meta_query()
             │ past_sql()
             └───────┬───────┘
        ┌────────────┼────────────┐
        │            │            │
EventQueryBuilder  Taxonomy   calendar-stats
                   Helper     (extrachill-events)

[homeboy-ci]

Homeboy Results — data-machine-events

Homeboy

Failure Digest

Lint Failure Digest

• No structured lint details available.
• Full lint log: https://github.com/Extra-Chill/data-machine-events/actions/runs/23387341940

Test Failure Digest

• Failed tests: 30
• No structured test failure details available.
• Full test log: https://github.com/Extra-Chill/data-machine-events/actions/runs/23387341940

Audit Failure Digest

• Drift increased: no
• No structured audit findings available.
• Full audit log: https://github.com/Extra-Chill/data-machine-events/actions/runs/23387341940

Autofixability classification

• Overall: auto_fixable
• Autofix enabled: yes
• Autofix attempted this run: no
• Auto-fixable failed commands:
  • lint
  • test
• Failed commands with available automated fixes:
  • lint
  • test

Machine-readable artifacts

• homeboy-lint-summary.json
• homeboy-test-failures.json
• homeboy-audit-summary.json
• homeboy-autofixability.json

⚡ Scope: changed files only

✅ audit (changed files only)

• Drift increased: no

❌ lint (changed files only)

❌ test (changed files only)

Tooling versions

• Homeboy CLI: homeboy 0.85.1+be7e22b
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: unknown
• Action: Extra-Chill/homeboy-action@v2

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Homeboy Action v1