Increase default repo-memory MaxFileSize from 10KB to 100KB

[Copilot]

push_repo_memory was failing for the sergo workflow because sergo-stats.json (11744 bytes) exceeded the default MAX_FILE_SIZE of 10240 bytes.

Changes

• pkg/workflow/repo_memory.go: Added defaultRepoMemoryMaxFileSize = 102400 constant; replaced all hardcoded 10240 defaults for MaxFileSize with the new constant
• pkg/workflow/repo_memory_test.go: Updated default value assertion to 102400
• pkg/parser/schemas/main_workflow_schema.json: Updated max-file-size field descriptions to reflect 100KB default

[Copilot]

Pull request overview

Increases the default repo-memory maximum file size from 10KB to 100KB and updates related schema/test expectations.

Changes:

• Added a shared defaultRepoMemoryMaxFileSize constant.
• Replaced repo-memory default max-file-size values with 102400 bytes.
• Updated schema descriptions and one default-value assertion.

Show a summary per file

File	Description
pkg/workflow/repo_memory.go	Defines and applies the new 100KB repo-memory max-file-size default.
pkg/workflow/repo_memory_test.go	Updates the boolean-default test expectation to 102400.
pkg/parser/schemas/main_workflow_schema.json	Updates schema descriptions for max-file-size default text.

Copilot's findings

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Comments suppressed due to low confidence (1)

pkg/workflow/repo_memory.go:342

• The object-style repo-memory default also changed here, but the object test currently supplies an explicit max-file-size, so this default path is not exercised. Please add coverage for object notation without max-file-size to confirm it now uses 102400.

			MaxFileSize:  defaultRepoMemoryMaxFileSize,         // 100KB default

• Files reviewed: 3/3 changed files
• Comments generated: 2