Add context window length parameter to postgres, redis and xata memory nodes

[jeanpaul]

Dev-PR: https://github.com/n8n-io/n8n/pull/10203

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[github-actions[bot]]

Overall readability score: 42.22 (🟢 +0)

File	Readability
n8n-nodes-langchain.memorybufferwindow.md	3.12 (🔴 -0.92)
n8n-nodes-langchain.memorypostgreschat.md	14.43 (🟢 +0.32)
n8n-nodes-langchain.memoryredischat.md	3.02 (🟢 +2.44)
n8n-nodes-langchain.memoryxata.md	0 (🟢 +0)

View detailed metrics

🟢 - Shows an increase in readability 🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
n8n-nodes-langchain.memorybufferwindow.md	3.12	0	18.81	22	19	10.13
	🔴 -0.92	🟢 +0	🔴 -0.31	🟢 +0	🟢 +0	🔴 -0.12
n8n-nodes-langchain.memorypostgreschat.md	14.43	9.08	13.97	22	19	9.66
	🟢 +0.32	🟢 +1.63	🟢 +0.2	🟢 +0	🟢 +0	🔴 -0.09
n8n-nodes-langchain.memoryredischat.md	3.02	0	17.84	22	19	10.68
	🟢 +2.44	🟢 +0	🟢 +1.16	🟢 +0	🟢 +0	🟢 +0.14
n8n-nodes-langchain.memoryxata.md	0	0	19	22	19	11
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	42.22	34.16	11.8	15.04	14.45	8.6
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less