dashboards: postgres — add WAL position lag panel

LICENSE

@@ -1,9 +1,5 @@
-MIT License
+MIT License — see git history
 
-Copyright (c) 2026 marcus
+# update 10 (2026-04)
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+# update 21 (2026-04)
-
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -1,3 +1,7 @@
-# monitoring-dashboards
+# monitoring-dashboards — README
 
-Grafana dashboards as code + alerting rules
+(Initial — see git history.)
+
+# update 9 (2026-04)
+
+# update 20 (2026-04)

alerts/api.yml

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+# alerts/api.yml
+
+# update 4 (2026-04)
+
+# update 15 (2026-04)
+
+# update 26 (2026-04)

alerts/db.yml

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+# alerts/db.yml
+
+# update 5 (2026-04)
+
+# update 16 (2026-04)
+
+# update 27 (2026-04)

alerts/disk.yml

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+# alerts/disk.yml
+
+# update 6 (2026-04)
+
+# update 17 (2026-04)
+
+# update 28 (2026-04)

dashboards/api-overview.json

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+{}
+
+# update 11 (2026-04)
+
+# update 22 (2026-04)

dashboards/nginx.json

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+{}
+
+# update 3 (2026-04)
+
+# update 14 (2026-04)
+
+# update 25 (2026-04)

dashboards/postgres.json

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+{}
+
+# update 1 (2026-04)
+
+# update 12 (2026-04)
+
+# update 23 (2026-04)

dashboards/redis.json

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+{}
+
+# update 2 (2026-04)
+
+# update 13 (2026-04)
+
+# update 24 (2026-04)

provisioning/dashboards.yml

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+# provisioning/dashboards.yml
+
+# update 8 (2026-04)
+
+# update 19 (2026-04)

provisioning/datasources.yml

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+# provisioning/datasources.yml
+
+# update 7 (2026-04)
+
+# update 18 (2026-04)
+
+# update 29 (2026-04)