docs: add rich partial notes description back in

[ciaranightingale]

This page was removed in the refactor

[AztecBot]

Flakey Tests

🤖 says: This CI run detected 2 tests that failed, but were tolerated due to a .test_patterns.yml entry.

\033FLAKED\033 (8;;http://ci.aztec-labs.com/7543e99d4bdc332f�7543e99d4bdc332f8;;�):  yarn-project/end-to-end/scripts/run_test.sh simple src/e2e_epochs/epochs_invalidate_block.parallel.test.ts "committee member invalidates a block if proposer does not come through" (97s) (code: 1) group:e2e-p2p-epoch-flakes (\033ciaranightingale\033: docs: add rich partial notes description back in (#19727))
\033FLAKED\033 (8;;http://ci.aztec-labs.com/34cc1cb68182a332�34cc1cb68182a3328;;�): yarn-project/scripts/run_test.sh validator-ha-signer/src/db/postgres.test.ts (10s) (code: 133) (\033ciaranightingale\033: docs: add rich partial notes description back in (#19727))