fix: preserve dots in Bedrock inference-profile IDs (#12295)

[vominh1919]

Fixes #12295

_anthropic_preserve_dots() didn't include 'bedrock' in the providers that preserve dots. AWS Bedrock inference-profile IDs like us.anthropic.claude-sonnet-4-5-20250929-v1:0 were mangled to us-anthropic-claude-sonnet-4-5-20250929-v1:0, causing HTTP 400.

Changes:

• Added "bedrock" to provider set in _anthropic_preserve_dots()
• Added "bedrock-runtime" to base_url fallback check
• Added 4 unit tests for Bedrock dot preservation

[mxnstrexgl]

✓ Automated scan: no security concerns. Bedrock profile ID fix.

[alt-glitch]

Competing fix alongside #12577, #12578, and #13112 — all address dots-to-hyphens mangling in Bedrock inference profile IDs. Closed #12297 was the same fix.

[teknium1]

Thanks for the fix, @vominh1919! This bug was real and the approach here is correct.

This is an automated hermes-sweeper review. After inspecting main, the exact changes proposed in this PR are already present:

• "bedrock" in _anthropic_preserve_dots() provider set and "bedrock-runtime." in the base_url check were merged via commit 1cf1016e7 (fix(run_agent): preserve dotted Bedrock inference-profile model IDs (#11976)).
• A broader follow-up, commit f2fba4f9a (fix(anthropic): auto-detect Bedrock model IDs in normalize_model_name (#12295)), extended the fix to cover auxiliary client calls that bypass preserve_dots entirely.

Both commits are confirmed ancestors of the current main HEAD. As @alt-glitch noted, this was addressed alongside competing PRs #12577, #12578, and #13112. Closing as implemented on main.