deployment: extract mempool common config

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[nimrod-starkware]

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• deployment: add monitoring endpoint port to hybrid common overlay #14266
• deployment: add http server port to hybrid common service overlay #14262
• deployment: add mempool p2p port to hybrid common service overlay #14261
• deployment: make gcpPodMonitoring enable configurable #14240
• deployment: fix storage reader port #14229
• deployment: add service ports to hybrid common service overlays #14215
• deployment: extract common env to hybrid/common/common.yaml #14249
• deployment: extract core common config #14248
• deployment: extract mempool common config #14247 👈 (View in Graphite)
• deployment: extract gateway common config #14246
• deployment: extract l1 common config #14245
• deployment: extract committer common config #14244
• deployment: extract sierra-compiler common config #14243
• deployment: support include directive in common yaml loader #14242
• deployment: add gcp pod monitoring to hybrid environment overlays #14192 : 1 other dependent PR (#14196 )
• deployment: add liveness probe to hybrid environment overlays #14191
• deployment: add readiness probe to hybrid environment overlays #14190
• deployment: add startup probe to hybrid environment overlays #14188
• deployment: add monitoring endpoint port to hybrid environment overlays #14187
• main-v0.14.3

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[cursor]

PR Summary

Low Risk
Config-only refactor with no intended runtime behavior change; risk is limited to a mis-merged include path breaking deployment for those environments.

Overview
Deduplicates hybrid mempool deployment config by moving the shared mempool service definition into configs/overlays/hybrid/common/services/mempool.yaml and wiring mainnet, sepolia-alpha, and sepolia-integration overlays to it via include:.

Per-environment mempool.yaml files no longer repeat configList, component URLs/ports, or mempool_config.dynamic_config.transaction_ttl; they only reference the common file, matching how other hybrid services (e.g. gateway, committer) are structured.

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