docs: 009/010 resolutions are in

docs/federation/resolutions/in-progress/009.md

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+## Resolution 009: Federation common fund buffer - 2023-07-03
+
+- Deadline: 2023-07-17
+- Size: Large
+
+### Summary
+
+The Co-op Cloud Federation has [a common fund](https://opencollective.com/coop-cloud#category-BUDGET) which can be used by federation members by proposing [budgets](https://docs.coopcloud.tech/federation/resolutions/passed/004/).
+
+With Resolution 009, we want to introduce the idea of a common fund buffer.
+
+This buffer is proposed to be set at 1,500 EUR. When the buffer is reached, no more budgets can be proposed. When the fund increases once more, budgets can resume.
+
+The buffer is in place to reserve funds for critical collective spending when we have limited income.
+
+### Details
+
+1,500 EUR is fairly arbitrarily chosen but seems to be a reasonable amount of money to cover situations where, e.g. we need to pay for servers, domains, mail accounts or other common critical infrastructure.