session: re-derive the TLS census pin at main's tip (544 -> 545)

[brandonros]

`tls_source_census_and_session_surface_are_pinned` fails on main: the tree has 545 `thread_local!` declarations and the pin says 544. The comment above the pin already warns that the number was carried from a donor branch and must be re-derived at the tip it is enforced against; this does that. No declaration has changed since bcda79e.

Independent of the objkv series, but objkv/3 (table AM) re-pins the same line at 552, so whichever lands second needs a one-line rebase.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Tests
  • Updated the TLS census test expectation to reflect the current count.
  • Revised the associated test comment to document the updated baseline.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Team

Run ID: 49b3ddde-26da-438f-acd6-48ece8afb299

📥 Commits

Reviewing files that changed from the base of the PR and between 4c2e49f and afaaee2.

📒 Files selected for processing (1)

• crates/backend/access/session/src/tests.rs

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📝 Walkthrough

Walkthrough

The session test updates its TLS census assertion from 544 to 545. The comment records that the count was re-derived at the current main tip and that no TLS declaration changed.

Changes

TLS census validation

Layer / File(s)	Summary
Update TLS census pin crates/backend/access/session/src/tests.rs	The assertion expects 545 TLS entries. The comment explains the re-derived count and unchanged declarations.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to afaae

This updates the TLS census test baseline to the current total of 545 without changing runtime behavior. No merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: re-deriving the TLS census pin from 544 to 545 at main's tip.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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