[chain-pr 1/12] Bump versions to v7.0.0 and update build/release configs

[johnHackworth]

This PR is part of a chain split from #0 v7 by chain-pr.

Changes

Version bumps across all package.json files, root package.json, gitlab CI changes for canary deploy versioning, and tsconfig/webpack target bumps to ES2020. Includes README, CHANGELOG, and developer-extension version bump.

Split overview

#	PR	Type	Title
1	—	config	Bump versions to v7.0.0 and update build/release configs
2	—	refactor	Drop legacy browser shims and ES2020 polyfills in core utilities
3	—	refactor	Replace BoundedBuffer with BufferedObservable and add onDrop
4	—	refactor	Add deterministic sampling helpers and shared session/telemetry context
5	—	refactor	Rewrite session storage strategies as reactive setSessionState API
6	—	refactor	Rewrite SessionManager with async start, deterministic sampling, and Promise-based init
7	—	feature	Migrate core domain modules to new session manager and bufferedData
8	—	feature	Migrate Logs SDK to async SessionManager and bufferedData consumers
9	—	feature	Migrate RUM core to async SessionManager and unified domain types
10	—	feature	Rewrite Session Replay recording engine on the new change-encoder pipeline
11	—	config	Update sandbox, dev tooling, scripts, and developer-extension for v7
12	—	test	Migrate e2e and performance test apps and scenarios to v7 APIs

graph LR
    G1["group 1 — Bump versions to v7.0.0 and update build/release configs"]
    G2["group 2 — Drop legacy browser shims and ES2020 polyfills in core utilities"]
    G3["group 3 — Replace BoundedBuffer with BufferedObservable and add onDrop"]
    G4["group 4 — Add deterministic sampling helpers and shared session/telemetry context"]
    G5["group 5 — Rewrite session storage strategies as reactive setSessionState API"]
    G6["group 6 — Rewrite SessionManager with async start, deterministic sampling, and Promise-based init"]
    G7["group 7 — Migrate core domain modules to new session manager and bufferedData"]
    G8["group 8 — Migrate Logs SDK to async SessionManager and bufferedData consumers"]
    G9["group 9 — Migrate RUM core to async SessionManager and unified domain types"]
    G10["group 10 — Rewrite Session Replay recording engine on the new change-encoder pipeline"]
    G11["group 11 — Update sandbox, dev tooling, scripts, and developer-extension for v7"]
    G12["group 12 — Migrate e2e and performance test apps and scenarios to v7 APIs"]
    G1 --> G2
    G1 --> G3
    G1 --> G4
    G1 --> G5
    G3 --> G6
    G4 --> G6
    G5 --> G6
    G6 --> G7
    G6 --> G8
    G7 --> G8
    G6 --> G9
    G7 --> G9
    G9 --> G10
    G10 --> G11
    G10 --> G12
    G11 --> G12

Loading

---

Draft — pending author review. Merge in order unless marked parallel.

[github-actions]

Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format.

---

I have read the CLA Document and I hereby sign the CLA

---

chain-pr[bot] seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}