chore: trim repo to store-only, remove carried-over monorepo build contexts

[ALLiDoizCode]

Re-does the trim that closed-stale #9 attempted, against current main (post dvm→store rename #19 and the pnpm-lock/Dockerfile.store fixes #16/#18). #9 was unsalvageable: it targeted the now-renamed entrypoint-dvm.ts and added a package-lock.json against main's committed pnpm-lock.yaml.

What this removes

The repo was carved from the monorepo docker/ aggregator and still carried every other image's build context. Now that store is a standalone payment-oblivious POST /store backend behind the connector (#19), this trims to just the store image:

• 11 non-store Dockerfiles — Dockerfile.{agent-runtime-patched,akash-anvil,akash-solana,akash-solana-explorer,mill,nix,oyster,sdk-e2e,toon-client,town,townhouse-api} — plus docker-compose-oyster.yml, supervisord.conf.
• Build-context dirs — configs/, dev-fixtures/, akash-ator-probe/, townhouse-ator-sidecar/.
• Non-store src/ entrypoints + helpers + tests — entrypoint-{sdk,toon-client,toon-client-helpers,town,townhouse-api}, attestation-server, shared. The store path (entrypoint-store.ts → store-backend.ts) imports none of them (verified via import graph).

Config touch-ups

• esbuild.config.mjs: build only src/entrypoint-store.ts (the other two entryPoints are now deleted).
• package.json: main/start → dist/entrypoint-store.js; drop unused @types/dockerode; refresh description.
• pnpm-lock.yaml: regenerated — dockerode types only (34 lines removed, 0 added) so --frozen-lockfile stays valid.
• README.md: the "Trim to store-only" follow-up is now marked done.

Scope note (deferred)

Only @types/dockerode was removed from deps. The heavier runtime deps (arweave, @ardrive/turbo-sdk, better-sqlite3, fastify/noble/solana externals, etc.) are part of the connector/sdk runtime closure that Dockerfile.store cherry-picks from the pnpm hoist trees, so a deeper dep prune needs a full docker build to validate and is intentionally left out of this PR.

Verification

pnpm install --frozen-lockfile   # lockfile in sync
pnpm build                       # → dist/entrypoint-store.js ONLY (246 KB)
pnpm test                        # → 22/22 pass (entrypoint-store.test.ts)

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