MET-161: add personal AMR replay perspective

[Miko997]

Outcome

Adds Zachary Dydek’s approved personal observation about a potential multi-vendor AMR live/replay use case to the indexed integrations and support page.

Linear: MET-161

Changes

• Adds a Potential multi-vendor replay use case section to docs/user-guide/integrations.md.
• Preserves the exact approved quote.
• Attributes the statement to Zachary Dydek personally and identifies it as a personal-capacity perspective.
• States that the observation does not change the documented support statuses and is not adoption, technical validation, conformance, or endorsement by any organization.

CI-discovered boundary

The first commit placed the text in the bounded profile specification. Hosted validation correctly rejected that attempt because the profile is content-hash-bound by the external-source family matrix. The next commit restored that file byte-for-byte to its original blob identity, without changing its expected hash or any evidence record. The failed attempt remains in normal branch history; no commit was amended, rebased, squashed, or removed.

Validation

• Final provider comparison against exact base 9d5b4ffa5236521423196a84acc6a613f7f13108: three commits ahead, zero behind.
• Final diff: one authorized Markdown file, 15 additions, zero deletions.
• Frozen profile blob restored exactly to 8f1beac41dc9347897fcba0ffcfd3a4d2a2a4455 and contains no added quote.
• Exact quote, indexed placement, attribution, organization-neutral language, and Markdown wrapping inspected on head 511b52a557395862e6bae43c937ce13bd7465917.
• Fresh hosted checks for the corrected head are authoritative.

Boundaries

No implementation, schemas, fixtures, proofs, tests, frozen releases, submitted-paper history, tags, or prior evidence changed. This PR does not claim adoption, validation, conformance, customer demand, or endorsement. It must remain open for owner review and a normal history-preserving merge; no automatic merge or publication is authorized.