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feat(fetch): shared fetch service, stage 1 (pooling, merging, host budgets, counters) (#702)

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Core's own HTTP fetch paths (APIHelper, fetch_espn_scoreboard and its date chunks, BackgroundDataService, BaseOddsManager.get_odds) go through one service in src/common/fetch_service.py: shared connection pools per retry policy, merged identical in-flight GETs, per-host token-bucket budgets (fetch_service.rate_limits), and per-plugin request counters published to GET /api/v3/plugins/fetch-stats. Return values, exceptions, cache keys, TTLs and retry policies are unchanged. Core-internal in this release; plugins should not import it directly yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Chuck
2026-10-01 15:38:11 -04:00
committed by GitHub
co-authored by Claude Opus 5.5
parent 9edeb6da14
commit 4be53d048b
19 changed files with 2407 additions and 31 deletions
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docs/ARCHITECTURE.md
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@@ -48,6 +48,7 @@ each other. They share three things:
| Plugin errors | cache `plugin_error_snapshot` | display: `ErrorSnapshotPublisher` ([`src/error_aggregator.py`](../src/error_aggregator.py)) | web: `read_error_report()` for `/api/v3/errors/*` |
| Error clear | cache `plugin_error_clear_request` | web | display |
| Font usage | cache `font_usage_snapshot` | display: `FontUsagePublisher` ([`src/font_usage.py`](../src/font_usage.py)) | web: Fonts tab |
| Fetch statistics (requests per plugin and host) | cache `fetch_stats_snapshot` | display: `FetchStatsPublisher` ([`src/common/fetch_service.py`](../src/common/fetch_service.py)), at most once a minute on change | web: `read_fetch_stats()` for `/api/v3/plugins/fetch-stats` |
| Plugin health | cache `plugin_health:<id>` | display (web writes on reset) | web: `/api/v3/plugins/health` |
| Plugin runtime (loaded, state, last error, version) | cache `plugin_runtime_snapshot` | display: `PluginRuntimePublisher` ([`src/plugin_system/plugin_runtime.py`](../src/plugin_system/plugin_runtime.py)) | web: `read_plugin_runtime()` for `/api/v3/plugins/installed`, `/plugins/state`, reconciliation |
| Preview frame | `/tmp/led_matrix_preview.png` | display: `DisplayManager`, gated by [`snapshot_policy`](../src/common/snapshot_policy.py) | web: display SSE stream, `/api/v3/health` (file age) |