feat(cline-pass): add glm-5.3-flash

[munim]

Closes #6052.

glm-5.3-flash is available in ClinePass but missing from provider data. Adds providers/cline-pass/models/cline-pass/glm-5.3-flash.toml:

• base_model = "zhipuai/glm-5.3-flash" (lab entry already exists)
• reasoning effort low|high|max + interleaved reasoning_content, matching glm-5.3
• reference pricing matches glm-5.3: $1.4 input / $4.4 output / $0.26 cache read per 1M tokens

bun validate passes.

[github-actions]

No actionable findings.

[munim]

Updated pricing: $0.075 input / $0.25 output per 1M tokens (cache read $0.015). ee4068e

[github-actions]

No actionable findings.

[munim]

Corrected to actual pricing: $0.15 input / $0.50 output / $0.03 cache read per 1M tokens.

[github-actions]

No actionable findings.

[munim]

Switched from base_model to a full inline entry: ClinePass lists this slug with name cline-pass/glm-5.3-flash and description "Latest natively multimodal model in the GLM-5 series" and declares no upstream lab mapping, so the provider file now carries the complete metadata (specs match Z.ai's GLM-5.3-Flash: 1M context, 131K output, text/image/video/pdf input, effort low|high|max, always-on reasoning via reasoning_content).

[github-actions]

Action items

• [high] [violation] providers/cline-pass/models/cline-pass/glm-5.3-flash.toml:6 - Check: Non-lab hosts must use base_model with override-only fields when the lab model is nameable. Why: ClinePass is a multi-model relay, not the lab. models/zhipuai/glm-5.3-flash.toml already exists, and peer providers/cline-pass/models/cline-pass/glm-5.3.toml correctly uses base_model = "zhipuai/glm-5.3". Patch 4 dropped base_model and inlined full lab metadata (name, description, family, dates, capabilities, [limit], [modalities]) because ClinePass “does not declare an upstream lab mapping.” That is not a valid exception—lack of host-side mapping does not make the model unique-to-host. Action: Restore base_model = "zhipuai/glm-5.3-flash" and keep only provider-specific fields/real deltas (cost, reasoning_options, interleaved, and any true overrides). Remove the restated identical lab fields.
• [low] [possible mistake] providers/cline-pass/models/cline-pass/glm-5.3-flash.toml:32 - Check: Material cost changes should cite direct provider pricing evidence mapped to the claim. Why: Cost flipped across commits (1.4/4.4/0.26 → 0.075/0.25/0.015 → 0.15/0.5/0.03) while the only citation is the general ClinePass page. First-party Zhipuai currently records the promo half-rate (0.075/0.25/0.015) with list 0.15/0.50/0.03, so the final numbers need a clear ClinePass-specific source. Action: Confirm the ClinePass reference rates for this model ID and note in the leading comment (or PR body) which doc/section supports $0.15 / $0.50 / $0.03 per 1M tokens.